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Week 01 : Programming Assignment 1

Due on 2025-02-06, 23:59 IST

Write a Java program to check if a given integer is even or odd.

NOTE:

The code you see is not complete.

Your task is to complete the code as per the question.
Think of it like a programming puzzle.

(Ignore presentation errors for this and all future programming assignments)
("passed with presentation error" means you will get full marks)

Your last recorded submission was on 2025-01-15, 16:23 IST

Select the Language for this assignment.

File name for this program :

import java.util.Scanner;
 
public class W01_P1 {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        int number = in.nextInt();

// Check if the number is even or odd
if (number % 2 == 0) {
  System.out.print("Even");
} else {
  System.out.print("Odd");
}

in.close();
    }
}

You may submit any number of times before the due date. The final submission will be considered for grading.

This assignment has Public Test cases. Please click on "Compile & Run" button to see the status of Public test cases. Assignment will be evaluated only after submitting using Submit button below. If you only save as or compile and run the Program , your assignment will not be graded and you will not see your score after the deadline.

Compilation : Passed
Public Test Cases: 1 / 1 Passed

Note: These tests may not be considered while scoring. Know more.

Public Test Cases	Input	Expected Output	Actual Output	Status
Test Case 1	4	Even	Even	Passed

Week 01 : Programming Assignment 2

Due on 2025-02-06, 23:59 IST

Write a Java program to calculate the volume of a cylinder given its radius and height.

Formula:

$V = π \times r^{2} \times h$

You can use Math.PI for the computation.

NOTE:

The code you see is not complete.

Your task is to complete the code as per the question.
Think of it like a programming puzzle.

(This question can be solved in just one line of code)

(Ignore presentation errors for this and all future programming assignments)
("passed with presentation error" means you will get full marks)

Your last recorded submission was on 2025-01-15, 16:25 IST

Select the Language for this assignment.

File name for this program :

import java.util.Scanner;
 
public class W01_P2 {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        double radius = in.nextDouble();
        double height = in.nextDouble();

// Calculate the volume
double volume = Math.PI * radius * radius * height;

// Display the result
    System.out.printf("Volume is: %.2f", volume);
    in.close();
  }
}

You may submit any number of times before the due date. The final submission will be considered for grading.

Compilation : Passed
Public Test Cases: 1 / 1 Passed

Note: These tests may not be considered while scoring. Know more.

Public Test Cases	Input	Expected Output	Actual Output	Status
Test Case 1	3.5 5.0	Volume is: 192.42	Volume is: 192.42	Passed

Week 01 : Programming Assignment 3

Due on 2025-02-06, 23:59 IST

Write a Java program to print the multiplication table of a given number up to 5.

NOTE:

Print EXACTLY as shown in the sample output.

DO NOT MISS a single space otherwise you will not be scored.

(Ignore presentation errors for this and all future programming assignments)
("passed with presentation error" means you will get full marks)

Your last recorded submission was on 2025-01-15, 16:28 IST

Select the Language for this assignment.

File name for this program :

import java.util.Scanner;
 
public class W01_P3 {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        int number = in.nextInt();

// Print the multiplication table of number up to 5
for (int i = 1; i <= 4; i++) {
   System.out.println(number + " x " + i + " = " + (number * i));
}
System.out.print(number + " x " + 5 + " = " + (number * 5));

in.close();
    }
}

You may submit any number of times before the due date. The final submission will be considered for grading.

Compilation : Passed
Public Test Cases: 1 / 1 Passed

Note: These tests may not be considered while scoring. Know more.

Public Test Cases	Input	Expected Output	Actual Output	Status
Test Case 1	5	5 x 1 = 5\n 5 x 2 = 10\n 5 x 3 = 15\n 5 x 4 = 20\n 5 x 5 = 25	5 x 1 = 5\n 5 x 2 = 10\n 5 x 3 = 15\n 5 x 4 = 20\n 5 x 5 = 25	Passed

Week 01 : Programming Assignment 4

Due on 2025-02-06, 23:59 IST

Complete the code fragment that reads two integer inputs from keyboard and compute the quotient and remainder.

(Ignore presentation errors for this and all future programming assignments)
("passed with presentation error" means you will get full marks)

Your last recorded submission was on 2025-01-15, 16:36 IST

Select the Language for this assignment.

File name for this program :

import java.util.Scanner;
public class W01_P4{
       public static void main(String[] args) {
       Scanner sc = new Scanner(System.in);
       int x=sc.nextInt();
       int y=sc.nextInt();

//code for quotient and remainder
if (y == 0) {
  System.out.println("Error: Division by zero is not allowed.");
}
else {
  int quotient = x / y;
  int remainder = x % y;
  System.out.println("The Quotient is = " + quotient);
  System.out.print("The Remainder is = " + remainder);
}

sc.close();
  }
}

You may submit any number of times before the due date. The final submission will be considered for grading.

Compilation : Passed
Public Test Cases: 1 / 1 Passed

Note: These tests may not be considered while scoring. Know more.

Public Test Cases	Input	Expected Output	Actual Output	Status
Test Case 1	556 9	The Quotient is = 61\n The Remainder is = 7	The Quotient is = 61\n The Remainder is = 7	Passed

Week 01 : Programming Assignment 5

Due on 2025-02-06, 23:59 IST

Write a program which will print a pattern of "*" 's of height "n".
For example:
Input:
               n = 3
Output:
               ***
               **
               *
               **
               ***

NOTE:
Print the pattern EXACTLY, without extra spaces.

(Ignore presentation errors for this and all future programming assignments)
("passed with presentation error" means you will get full marks)

Your last recorded submission was on 2025-01-15, 16:53 IST

Select the Language for this assignment.

File name for this program :

import java.util.*;
public class W01_P5{
    public static void main(String[] args) {
        Scanner inr = new Scanner(System.in);
       int n = inr.nextInt();

// Add the necessary code in the below space
for(int i = n; i >= 1; i--) {
  for(int j = 1; j <= i; j++) {
    System.out.print("*");
  }
  System.out.println();
}
for(int i = n-1; i >= 1; i--) {
  for(int j = 1; j <= n-i+1; j++) {
    System.out.print("*");
  }
  if ( i != 1 )
    System.out.println();
}

inr.close();
    }
}

You may submit any number of times before the due date. The final submission will be considered for grading.

Compilation : Passed
Public Test Cases: 1 / 1 Passed

Note: These tests may not be considered while scoring. Know more.

Public Test Cases	Input	Expected Output	Actual Output	Status
Test Case 1	6	****\n *\n \n \n \n \n \n \n *\n *\n ****	****\n *\n \n \n \n \n \n \n *\n *\n ****	Passed

Week 02 : Programming Assignment 1

Due on 2025-02-06, 23:59 IST

Write a Java program to create a class Student with the following attributes: name, age, and grade. Create a constructor to initialize these attributes. Display the student’s information using a method displayInfo().

NOTE:

The code you see is not complete.

Select the Language for this assignment.

File name for this program :

import java.util.*;
 
class Student {
    String name;
    int age;
    String grade;
 
    // Constructor
    public Student(String name, int age, String grade) {
        this.name = name;
        this.age = age;
        this.grade = grade;
    }
 
    public void displayInfo() {
        System.out.println("Student Name: " + name);
        System.out.println("Age: " + age);
        System.out.print("Grade: " + grade);
    }
}
public class W02_P1 {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        String name = sc.nextLine();
        int age = sc.nextInt();
        String grade = sc.next();

// Create a Student object and call displayInfo
// Add the necessary code in the spaces below 
 
 
//code to create student object 
Student student = new Student(name, age, grade);
 
//code to call displayInfo function
student.displayInfo();

sc.close();
}
}

You may submit any number of times before the due date. The final submission will be considered for grading.

Compilation : Passed
Public Test Cases: 1 / 1 Passed

Note: These tests may not be considered while scoring. Know more.

Public Test Cases	Input	Expected Output	Actual Output	Status
Test Case 1	Rahul 29 A	Student Name: Rahul\n Age: 29\n Grade: A	Student Name: Rahul\n Age: 29\n Grade: A	Passed

Week 02 : Programming Assignment 2

Due on 2025-02-06, 23:59 IST

Write a program that demonstrates constructor overloading. Create a class Student with two constructors:

A constructor that accepts name and age
A constructor that accepts all three attributes: name, age, and grade.

Print the student's information using a method displayInfo().

Input:

name (String)
age (int)
grade (String, optional)

Output:
The program should output:

Name: <name>
Age: <age>
Grade: <grade>

Select the Language for this assignment.

File name for this program :

import java.util.*;
public class Student {
    String name;
    int age;
    String grade;
 
    public Student(String name, int age) {
        this.name = name;
        this.age = age;
    }
 
    public Student(String name, int age, String grade) {
        this.name = name;
        this.age = age;
        this.grade = grade;
    }
 
    public void displayInfo() {
        System.out.println("Name: " + name);
        System.out.println("Age: " + age);
        if(!grade.isEmpty()||grade!=null) System.out.print("Grade: " + grade);
    }
 
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        String name = sc.nextLine();
        int age = sc.nextInt();
        String grade= null;
 
        // Check if grade is provided or not
        if(sc.hasNextLine())
        {
         sc.nextLine();
         grade =  sc.nextLine();
         }
        
        // Create the student object
        Student student;

// Write the appropriate constructor call code in the given spaces
if (grade == null ||grade.isEmpty()) {
    student = new Student(name, age);  // Add your code to call the constructor when grade is not given in input
} else {
    student = new Student(name, age, grade);  // Add your code to call the constructor when grade is given in input
}
 
// code to call displayInfo function to display the information
student.displayInfo();  // Call the displayInfo method to display the student's information

sc.close();
    }
}

You may submit any number of times before the due date. The final submission will be considered for grading.

Compilation : Passed
Public Test Cases: 1 / 1 Passed

Note: These tests may not be considered while scoring. Know more.

Public Test Cases	Input	Expected Output	Actual Output	Status
Test Case 1	Rahul 30 A	Name: Rahul\n Age: 30\n Grade: A	Name: Rahul\n Age: 30\n Grade: A	Passed

Week 02 : Programming Assignment 3

Due on 2025-02-06, 23:59 IST

Write a program to demonstrate the use of this keyword. Create a class Rectangle with attributes length and breadth. Write a constructor to initialize these values. Also, define a method area() to return the area of the rectangle.

Input:
Two integers: length and breadth of the rectangle.

Output:
Print the area of the rectangle.

Select the Language for this assignment.

File name for this program :

import java.util.*;
public class W02_P3{
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int length = sc.nextInt();
        int breadth = sc.nextInt();

// Define the class Rectangle here
// Use the this keyword in the constructor
// Define the area method
 
class Rectangle {
    int length, breadth;
 
    // Constructor
    Rectangle(int length, int breadth) {
        this.length = length; 
        this.breadth = breadth;
    }
 
    // Method to calculate area
     int area() {
        return length * breadth; //write the correct formula
    }
}

// Create an object of Rectangle and call the area method
        Rectangle r = new Rectangle(length, breadth);
        System.out.print(r.area());
 
        sc.close();
    }
}

You may submit any number of times before the due date. The final submission will be considered for grading.

Compilation : Passed
Public Test Cases: 1 / 1 Passed

Note: These tests may not be considered while scoring. Know more.

Public Test Cases	Input	Expected Output	Actual Output	Status
Test Case 1	5 10	50	50	Passed

Week 02 : Programming Assignment 4

Due on 2025-02-06, 23:59 IST

Create a class Car with attributes brand and price. Add a method display() to show the car details. Write a program to create two objects of this class and display their details.

Input:
Two lines, each containing:

Car brand (a single word)
Car price (an integer)

Output:
Print the brand and price of both cars.

Select the Language for this assignment.

File name for this program :

import java.util.*;
public class W02_P4{
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        String brand1 = sc.next();
        int price1 = sc.nextInt();
        String brand2 = sc.next();
        int price2 = sc.nextInt();

// Define the class Car here
// Write a constructor and a display method
 
class Car {
    //variables 
    String brand;
    int price;
 
    // Constructor
    Car(String brand, int price) {
        this.brand = brand;
        this.price = price;
    }
 
    // Display method
    void display(int num) {
        System.out.println("Car " + num + ": " + brand + ", Price: " + price);
    }
}

// Create two objects of Car and display their details
        // Main code
       Car car1 = new Car(brand1, price1);
       Car car2 = new Car(brand2, price2);
       car1.display(1);
       car2.display(2);
 
        sc.close();
    }
}

You may submit any number of times before the due date. The final submission will be considered for grading.

Compilation : Passed
Public Test Cases: 1 / 1 Passed

Note: These tests may not be considered while scoring. Know more.

Public Test Cases	Input	Expected Output	Actual Output	Status
Test Case 1	Maruti 500000 Honda 800000	Car 1: Maruti, Price: 500000\n Car 2: Honda, Price: 800000	Car 1: Maruti, Price: 500000\n Car 2: Honda, Price: 800000\n	Passed after ignoring Presentation Error

Week 02 : Programming Assignment 5

Due on 2025-02-06, 23:59 IST

Write a Java program to demonstrate the concept of encapsulation by modeling a Book object. The program should include methods for setting and getting the title and author of the book, and a method to display the details of the book.

Task:

Create a class Book with the following private attributes:
- title (String)
- author (String)
Include the following methods in the Book class:
- setTitle(String title) to set the title of the book.
- setAuthor(String author) to set the author of the book.
- getTitle() to return the title of the book.
- getAuthor() to return the author of the book.
- displayDetails() to print the details of the book in the format
```
Title: <title>  
Author: <author>  
```
In the main() method, create an object of the Book class, set the title and author, and then call the displayDetails() method to print the book details.

Input:

The first line contains the title of the book (a single word).
The second line contains the author's name (a single word).

Output:
Print the details of the book in the format:

Title: <title>  
Author: <author>

Example:

Input:

JavaProgramming  
JohnDoe

Output:

Title: JavaProgramming  
Author: JohnDoe

Select the Language for this assignment.

File name for this program :

import java.util.Scanner;
 
public class W02_P5{
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        String title = sc.next();
        String author = sc.next();
        
        // Create a Book object
        Book book = new Book();
        
        // Set title and author
        book.setTitle(title);
        book.setAuthor(author);
        
        // Display book details
        book.displayDetails();
    }
}

// Define the Book class with private attributes for title and author
// Create getter and setter methods for both title and author
// Add a displayDetails method to print the title and author
 
 
class Book {
    // Private attributes
    private String title;
    private String author;
    
    // Setter for title
    public void setTitle(String title) {
        this.title = title;
    }
    
    // Setter for author
    public void setAuthor(String author) {
        this.author = author;
    }
    
    // Getter for title
    public String getTitle() {
        return this.title;
    }
    
    // Getter for author
    public String getAuthor() {
        return this.author;
    }

// Method to display details
    public void displayDetails() {
        System.out.println("Title: " + this.title);
        System.out.print("Author: " + this.author);
    }
}

You may submit any number of times before the due date. The final submission will be considered for grading.

Compilation : Passed
Public Test Cases: 1 / 1 Passed

Note: These tests may not be considered while scoring. Know more.

Public Test Cases	Input	Expected Output	Actual Output	Status
Test Case 1	DataStructures Alice	Title: DataStructures\n Author: Alice	Title: DataStructures\n Author: Alice	Passed

Week 03 : Programming Assignment 1

Due on 2025-02-13, 23:59 IST

Write a program to print the factorial of a number by defining a static recursive method named 'Factorial'.

Factorial of any number n is represented by n! and is equal to 1*2*3*....*(n-1)*n. E.g.-

4! = 1*2*3*4 = 24

3! = 3*2*1 = 6

2! = 2*1 = 2

Also,

1! = 1

0! = 1

(Remember to match the output given exactly, including the spaces and new lines)

(passed with presentation error means you will get full marks)

Your last recorded submission was on 2025-02-11, 18:08 IST

Select the Language for this assignment.

File name for this program :

import java.util.Scanner;
class W03_P1{

//Create recursive method to find factorial of a number
public static int factorial(int n) {
        if (n == 0 || n == 1) {
            return 1;
        } else {
            return n * factorial(n - 1);
        }
    }

public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        int x;
        x = in.nextInt();
        System.out.print(factorial(x));   
  }
}

You may submit any number of times before the due date. The final submission will be considered for grading.

Compilation : Passed
Public Test Cases: 1 / 1 Passed

Note: These tests may not be considered while scoring. Know more.

Public Test Cases	Input	Expected Output	Actual Output	Status
Test Case 1	5	120	120	Passed

Week 03 : Programming Assignment 2

Due on 2025-02-13, 23:59 IST

There are two class cls1 and cls2 which is subclass of cls1. cls1 having a method "add" which add two numbers. Create two method inside cls2 which will take 2 parameters as input i.e. a and b and print the sum , multiplication and sum of their squares i.e (a^2) + (b^2) (name the function task())

(Remember to match the output given exactly, including the spaces and new lines)

(passed with presentation error means you will get full marks)

Your last recorded submission was on 2025-02-11, 18:24 IST

Select the Language for this assignment.

File name for this program :

import java.util.Scanner;
class cls1
{
    void add(int p,int q)
    {
        System.out.println(p+q);
    }
}

//Create subclass cls2 of cls1 which perform task of multiplication and sum of squares of passing two parameters.
class cls2 extends cls1 {
    public void mul(int a, int b) {
        System.out.println(a * b);
    }
  public void task(int a, int b) {
        int sumOfSquares = (a * a) + (b * b);
        System.out.print(sumOfSquares);
    }
}

public class W03_P2{
    public static void main(String args[])
    {
        Scanner sc=new Scanner(System.in);
    
        cls2 obj=new cls2();
        int a=sc.nextInt();
        int b=sc.nextInt();
        //String tilde=sc.next();
        obj.add(a,b);
        obj.mul(a,b);
        obj.task(a,b);
    
    }
}

You may submit any number of times before the due date. The final submission will be considered for grading.

Compilation : Passed
Public Test Cases: 1 / 1 Passed

Note: These tests may not be considered while scoring. Know more.

Public Test Cases	Input	Expected Output	Actual Output	Status
Test Case 1	2 4	6\n 8\n 20	6\n 8\n 20	Passed

Week 03 : Programming Assignment 3

Due on 2025-02-13, 23:59 IST

Complete the code segment to count number of digits in an integer using while loop.

(Remember to match the output given exactly, including the spaces and new lines)

(passed with presentation error means you will always get full marks)

Your last recorded submission was on 2025-02-11, 18:59 IST

Select the Language for this assignment.

File name for this program :

import java.util.Scanner;
public class W03_P3{
    public static void main(String[] args) {
       Scanner sc = new Scanner(System.in);
       int num=sc.nextInt();

//Use while loop to count number of digits in an integer
int count = 0;
if (num == 0) {
            count = 1;  // 0 has one digit
        } else {
            while (num != 0) {
                num = num / 10; // Integer division removes the last digit
                count++;
            }
        }
System.out.print(count);

}
}

You may submit any number of times before the due date. The final submission will be considered for grading.

Compilation : Passed
Public Test Cases: 2 / 2 Passed

Note: These tests may not be considered while scoring. Know more.

Public Test Cases	Input	Expected Output	Actual Output	Status
Test Case 1	153	3	3	Passed
Test Case 2	0003452	4	4	Passed

Week 03 : Programming Assignment 4

Due on 2025-02-13, 23:59 IST

A Student class with private fields (name, age) is provided,

Your task is to make the following:

§ a parameterized constructor to initialize the private fields

§ the getter/setter methods for each field

Follow the naming convention as given in the main method of the suffix code.

Your last recorded submission was on 2025-02-11, 19:02 IST

Select the Language for this assignment.

File name for this program :

import java.util.Scanner;
class Student {
    private String name;
    private int age;

// ================================
    // TODO: Implement the Student class with private fields (name, age),
    //       a constructor, and getter/setter methods.
// Parameterized constructor
    public Student(String name, int age) {
        this.name = name;
        this.age = age;
    }
    // Getter for name
    public String getName() {
        return name;
    }
    // Getter for age
    public int getAge() {
        return age;
    }

public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
 
        // System.out.print("Enter student name: ");
        String name = scanner.next();
 
        // System.out.print("Enter student age: ");
        int age = scanner.nextInt();
 
        Student student = new Student(name, age);
 
        System.out.print("Name: " + student.getName() + ", Age: " + student.getAge());
 
        scanner.close();
    }
}

You may submit any number of times before the due date. The final submission will be considered for grading.

Compilation : Passed
Public Test Cases: 2 / 2 Passed

Note: These tests may not be considered while scoring. Know more.

Public Test Cases	Input	Expected Output	Actual Output	Status
Test Case 1	John 20	Name: John, Age: 20	Name: John, Age: 20	Passed
Test Case 2	Alice 25	Name: Alice, Age: 25	Name: Alice, Age: 25	Passed

Week 03 : Programming Assignment 5

Due on 2025-02-13, 23:59 IST

This program is an exercise to call static and non-static methods.

A partial code is given defining two methods, namely sum( ) and multiply ( ).

You have to call these methods to find the sum and product of two numbers.

Complete the code segment as instructed.

Your last recorded submission was on 2025-02-11, 19:07 IST

Select the Language for this assignment.

File name for this program :

import java.util.Scanner;
class QuestionScope {
int sum(int a, int b){ //non-static method
        return a + b;
    }
static int multiply(int a, int b){ //static method
        return a * b;
    }
}
public class W03_P5{
public static void main( String[] args ) {
        Scanner sc = new Scanner(System.in);
     int n1=sc.nextInt();
     int n2=sc.nextInt();
     QuestionScope st= new QuestionScope(); // Create an object to call non-static method

//Call the method sum() to find the sum of two numbers and store in result1
int result1 = st.sum(n1, n2);
//Call the method multiply() to find the product of two numbers and store in result2
int result2 = QuestionScope.multiply(n1, n2);

System.out.println(result1);
    System.out.print(result2);  
  }
}

You may submit any number of times before the due date. The final submission will be considered for grading.

Compilation : Passed
Public Test Cases: 1 / 1 Passed

Note: These tests may not be considered while scoring. Know more.

Public Test Cases	Input	Expected Output	Actual Output	Status
Test Case 1	3 5	8\n 15	8\n 15	Passed

Week 04 : Programming Assignment 1

Due on 2025-02-20, 23:59 IST

Complete the code segment to execute the following program successfully. Note: You should import the correct package(s) and/or class(s) to complete the code.

Your last recorded submission was on 2025-02-18, 23:08 IST

Select the Language for this assignment.

File name for this program :

// Import the required package(s) and/or class(es)
//HINT1:  Import of pre-defined package java.util and class Scanner
//HINT2:  Import of pre-defined package java.lang and class System and all of its member
import java.util.Scanner;
import static java.lang.System.*;

// main class Question is created
public class Main{
  public static void main(String[] args) {
    // Scanner object is created
    Scanner scanner = new Scanner(System.in);
     // Read String input using scanner class
    String courseName = scanner.nextLine(); 
     // Print the scanned String
    out.println("Course: " + courseName); 
  }
}

You may submit any number of times before the due date. The final submission will be considered for grading.

Compilation : Passed
Public Test Cases: 1 / 1 Passed

Note: These tests may not be considered while scoring. Know more.

Public Test Cases	Input	Expected Output	Actual Output	Status
Test Case 1	JOY WITH JAVA	Course: JOY WITH JAVA	Course: JOY WITH JAVA\n	Passed after ignoring Presentation Error

Week 04 : Programming Assignment 2

Due on 2025-02-20, 23:59 IST

Complete the code segment to print the current year.
Your code should compile successfully.

Note: In this program, you are not allowed to use any import statement. You should use predefined class Calendar defined in java.util package.

Your last recorded submission was on 2025-02-18, 23:09 IST

Select the Language for this assignment.

File name for this program :

// The following is the declaration of the main class named Main
public class Main{ 
    public static void main(String args[]){
        int year; // integer type variable to store year    
 
                 // Create an object of Calendar class. 
                 java.util.Calendar current; 
 
                // Use getInstance() method to initialize the Calendar object.
                 current = java.util.Calendar.getInstance();

// Initialize the int variable year with the current year
year = current.get(current.YEAR);

// Print the current Year
System.out.println("Current Year: "+year);
 
}
}

You may submit any number of times before the due date. The final submission will be considered for grading.

Compilation : Passed
Public Test Cases: 1 / 1 Passed

Note: These tests may not be considered while scoring. Know more.

Public Test Cases	Input	Expected Output	Actual Output	Status
Test Case 1	NA	Current Year: 2025	Current Year: 2025\n	Passed after ignoring Presentation Error

Week 04 : Programming Assignment 3

Due on 2025-02-20, 23:59 IST

The program in this assignment is attempted to print the following output:

-----------------OUTPUT-------------------

This is large

This is medium

This is small

This is extra-large

-------------------------------------------------

However, the code is intentionally with some bugs in it. Debug the code to execute the program successfully.

Your last recorded submission was on 2025-02-18, 23:12 IST

Select the Language for this assignment.

File name for this program :

interface ExtraLarge{
    static String extra = "This is extra-large";
    void display();
}
 
class Large {
    public void Print() {
        System.out.println("This is large");
    }
}
 
class Medium extends Large {
    public void Print() {
        super.Print();  
        System.out.println("This is medium");
    }
}
class Small extends Medium {
    public void Print() {
        super.Print();  
        System.out.println("This is small");
    }
}
 
class Main implements ExtraLarge{
    public static void main(String[] args) {
        Small s = new Small();
        s.Print();
    Main q = new Main();
    q.display();
    }
    public void display(){
        System.out.println(extra);
    }
}

You may submit any number of times before the due date. The final submission will be considered for grading.

Compilation : Passed
Public Test Cases: 1 / 1 Passed

Note: These tests may not be considered while scoring. Know more.

Public Test Cases	Input	Expected Output	Actual Output	Status
Test Case 1	NA	This is large\n This is medium\n This is small\n This is extra-large	This is large\n This is medium\n This is small\n This is extra-large\n	Passed after ignoring Presentation Error

Week 04 : Programming Assignment 4

Due on 2025-02-20, 23:59 IST

Complete the code segment to call the default method in the interface First and Second.

Your last recorded submission was on 2025-02-18, 23:14 IST

Select the Language for this assignment.

File name for this program :

interface First{ 
    // default method 
    default void show(){ 
        System.out.println("Default method implementation of First interface."); 
    } 
} 
  
interface Second{ 
    // Default method 
    default void show(){ 
        System.out.println("Default method implementation of Second interface."); 
    } 
} 
  
// Implementation class code 
class Main implements First, Second{ 
    // Overriding default show method 
    public void show(){

// Call show() of First interface.
First.super.show();
// Call show() of Second interface.
Second.super.show();

} 
  
    public static void main(String args[]){ 
        Main q = new Main(); 
        q.show(); 
    } 
}

You may submit any number of times before the due date. The final submission will be considered for grading.

Compilation : Passed
Public Test Cases: 1 / 1 Passed

Note: These tests may not be considered while scoring. Know more.

Public Test Cases	Input	Expected Output	Actual Output	Status
Test Case 1	NA	Default method implementation of First interface.\n Default method implementation of Second interface.	Default method implementation of First interface.\n Default method implementation of Second interface.\n	Passed after ignoring Presentation Error

Public Test Cases

Input

Expected Output

Actual Output

Status

Test Case 1

NA

Default method implementation of First interface.\n
Default method implementation of Second interface.

Default method implementation of First interface.\n
Default method implementation of Second interface.\n

Passed after ignoring Presentation Error

Week 04 : Programming Assignment 5

Due on 2025-02-20, 23:59 IST

Modify the code segment to print the following output.

-----------------OUTPUT-------------------

Circle: This is Shape1

Circle: This is Shape2

-------------------------------------------------

Your last recorded submission was on 2025-02-18, 23:15 IST

Select the Language for this assignment.

File name for this program :

// Interface ShapeX is created
interface ShapeX {
 public String base = "This is Shape1";
 public void display1();
}
 
// Interface ShapeY is created which extends ShapeX
interface ShapeY extends ShapeX {
 public String base = "This is Shape2";
 public void display2();
}

//the code in this cell is sample code --please edit this to perform as asked in the question
 
 
// Class ShapeG is created which implements ShapeY
class ShapeG implements ShapeY {
 public String base = "This is Shape3";
 //Overriding method in ShapeX interface
 public void display1() {
  System.out.println("Circle: " + ShapeX.base);
 }
 // Overriding method in ShapeY interface
 public void display2() {
  System.out.println("Circle: " + ShapeY.base);
 }
}

public class Main{
 public static void main(String[] args) {
  //Object of class shapeG is created and display methods are called.
  ShapeG circle = new ShapeG();
  circle.display1();
  circle.display2();
 }
}

You may submit any number of times before the due date. The final submission will be considered for grading.

Compilation : Passed
Public Test Cases: 1 / 1 Passed

Note: These tests may not be considered while scoring. Know more.

Public Test Cases	Input	Expected Output	Actual Output	Status
Test Case 1	NA	Circle: This is Shape1\n Circle: This is Shape2	Circle: This is Shape1\n Circle: This is Shape2\n	Passed after ignoring Presentation Error

Week 05 : Programming Assignment 1

Due on 2025-02-27, 23:59 IST

An interface Number is defined in the following program.

You have to declare a class A, which will implement the interface Number.

Note that the method findSqr(n) will return the square of the number n.

Your last recorded submission was on 2025-02-21, 07:53 IST

Select the Language for this assignment.

File name for this program :

import java.util.Scanner;
 
interface Number {
    int findSqr(int i);  // Returns the square of n
}

class A implements Number{
  public int findSqr(int i){
    return i*i;
  }
}

public class W05_P1{ 
        public static void main (String[] args){ 
          A a = new A();   //Create an object of class A
           // Read a number from the keyboard
           Scanner sc = new Scanner(System.in);  
           int i = sc.nextInt();
           System.out.print(a.findSqr(i)); 
    } 
}

You may submit any number of times before the due date. The final submission will be considered for grading.

Compilation : Passed
Public Test Cases: 1 / 1 Passed

Note: These tests may not be considered while scoring. Know more.

Public Test Cases	Input	Expected Output	Actual Output	Status
Test Case 1	12	144	144	Passed

Week 05 : Programming Assignment 2

Due on 2025-02-27, 23:59 IST

This program is to find the GCD (greatest common divisor) of two integers writing a recursive function findGCD(n1,n2).

Your function should return -1, if the argument(s) is(are) negative (zero is allowed).

Your last recorded submission was on 2025-02-21, 07:54 IST

Select the Language for this assignment.

File name for this program :

import java.util.Scanner;
 
interface GCD {
    public int findGCD(int n1,int n2);
}

class B implements GCD{
  public int findGCD(int n1,int n2){
    if ( n1 < 0 || n2 < 0 )
      return(-1);
    else if ( n2 == 0 )
      return n1;
    else if ( n1 > n2 )
      return findGCD(n2,n1%n2);
    else
      return findGCD(n1,n2%n1);
      }
}

public class W05_P2{ 
        public static void main (String[] args){ 
          B a = new B();   //Create an object of class B
            // Read two numbers from the keyboard
            Scanner sc = new Scanner(System.in);  
            int p1 = sc.nextInt();
           int p2 = sc.nextInt();
            System.out.print(a.findGCD(p1,p2)); 
    } 
}

You may submit any number of times before the due date. The final submission will be considered for grading.

Compilation : Passed
Public Test Cases: 2 / 2 Passed

Note: These tests may not be considered while scoring. Know more.

Public Test Cases	Input	Expected Output	Actual Output	Status
Test Case 1	20 30	10	10	Passed
Test Case 2	2 -1	-1	-1	Passed

Week 05 : Programming Assignment 3

Due on 2025-02-27, 23:59 IST

Complete the code segment to catch the ArithmeticException in the following, if any.

On the occurrence of such an exception, your program should print “Exception caught: Division by zero.”

If there is no such exception, it will print the result of division operation on two integer values.

Your last recorded submission was on 2025-02-21, 07:58 IST

Select the Language for this assignment.

File name for this program :

import java.util.Scanner;
  
  public class W05_P3 {
  public static void main(String[] args) { 
      int a, b;
      Scanner input = new Scanner(System.in);
       // Read any two values for a and b
       int result;  
 
       a = input.nextInt();
       b = input.nextInt();

// try block to divide two numbers and display the result
         try {
              result = a/b;
              System.out.print(result);
             }
          // catch block to catch the ArithmeticException
          catch (ArithmeticException e) {
             System.out.print("Exception caught: Division by zero.");
          }

}
}

You may submit any number of times before the due date. The final submission will be considered for grading.

Compilation : Passed
Public Test Cases: 2 / 2 Passed

Note: These tests may not be considered while scoring. Know more.

Public Test Cases	Input	Expected Output	Actual Output	Status
Test Case 1	4 5	0	0	Passed
Test Case 2	20 0	Exception caught: Division by zero.	Exception caught: Division by zero.	Passed

Week 05 : Programming Assignment 4

Due on 2025-02-27, 23:59 IST

In the following program, an array of integer data to be initialized.

During the initialization, if a user enters a value other than integer value, then it will throw InputMismatchException exception.

On the occurrence of such an exception, your program should print “You entered bad data.”

If there is no such exception it will print the total sum of the array.

Your last recorded submission was on 2025-02-21, 07:59 IST

Select the Language for this assignment.

File name for this program :

//Prefixed Fixed Code:
import java.util.Scanner;
import java.util.InputMismatchException;
 
public class W05_P4 {
  public static void main(String[] args) {
      Scanner sc = new Scanner(System.in); 
    int length = sc.nextInt(); 
    // create an array to save user input 
    int[] name = new int[length];
     int sum=0;//save the total sum of the array.

try{
       for(int i=0;i<length;i++){  
          int userInput=sc.nextInt();
          name[i] = userInput;
          sum=sum+name[i]; 
          } 
        System.out.print(sum);
        }
       catch(InputMismatchException e) {
        System.out.print("You entered bad data.");
        }

}
}

You may submit any number of times before the due date. The final submission will be considered for grading.

Compilation : Passed
Public Test Cases: 2 / 2 Passed

Note: These tests may not be considered while scoring. Know more.

Public Test Cases	Input	Expected Output	Actual Output	Status
Test Case 1	3 5 2 1	8	8	Passed
Test Case 2	2 1 h	You entered bad data.	You entered bad data.	Passed

Week 05 : Programming Assignment 5

Due on 2025-02-27, 23:59 IST

In the following program, there may be multiple exceptions.

You have to complete the code using only one try-catch block to handle all the possible exceptions.

For example, if user’s input is 1, then it will throw and catch “java.lang.NullPointerException“.

Your last recorded submission was on 2025-02-21, 08:00 IST

Select the Language for this assignment.

File name for this program :

import java.util.Scanner;
public class W05_P5{
      public static void main (String   args[ ] ) {
        Scanner scan = new Scanner(System.in);
          int i=scan.nextInt();
          int j;

try {
             switch (i) {
            case 0 : 
            int zero = 0; 
            j = 92/ zero;       
            break;
            case 1 : 
            int b[ ] = null; 
            j = b[0] ;  
            break;
               default:
               System.out.print("No exception");
            }       
          }
            // catch block          
        catch (Exception e) {       
           System.out.print(e) ;
        }

}
}

You may submit any number of times before the due date. The final submission will be considered for grading.

Compilation : Passed
Public Test Cases: 3 / 3 Passed

Note: These tests may not be considered while scoring. Know more.

Public Test Cases	Input	Expected Output	Actual Output	Status
Test Case 1	5	No exception	No exception	Passed
Test Case 2	1	java.lang.NullPointerException	java.lang.NullPointerException	Passed
Test Case 3	0	java.lang.ArithmeticException: / by zero	java.lang.ArithmeticException: / by zero	Passed

Week 06 : Programming Assignment 1

Due on 2025-03-06, 23:59 IST

Complete the code segment to print the following using the concept of extending the Thread class in Java:

-----------------OUTPUT-------------------

Thread is Running.

-------------------------------------------------

Your last recorded submission was on 2025-02-21, 08:01 IST

Select the Language for this assignment.

File name for this program :

// Modify the code to extend the Thread class to complete the class Question61.
public class W06_P1 extends Thread{
    public void run(){
        System.out.print("Thread is Running.");
    }

public static void main(String args[]){  
 
        // Creating object of thread class
        W06_P1 thread=new W06_P1();  
 
                // Start the thread
        thread.start();
    }  
}

You may submit any number of times before the due date. The final submission will be considered for grading.

Compilation : Passed
Public Test Cases: 1 / 1 Passed

Note: These tests may not be considered while scoring. Know more.

Public Test Cases	Input	Expected Output	Actual Output	Status
Test Case 1	NA	Thread is Running.	Thread is Running.	Passed

Week 06 : Programming Assignment 2

Due on 2025-03-06, 23:59 IST

In the following program, a thread class ThreadRun is created using the Runnable interface which prints "Thread using Runnable interface". Complete the main class to create a thread object of the class ThreadRun and run the thread.

Your last recorded submission was on 2025-02-21, 08:19 IST

Select the Language for this assignment.

File name for this program :

class ThreadRun implements Runnable {
        public void run(){ 
            System.out.print("Thread using Runnable interface."); 
        } 
   }

// Create main class W06_P2 with main() method and appropriate statements in it
public class W06_P2{  
    public static void main(String[] args) {  
        ThreadRun ex = new ThreadRun();  
        Thread t1= new Thread(ex);
        t1.start();
    }
}

You may submit any number of times before the due date. The final submission will be considered for grading.

Compilation : Passed
Public Test Cases: 1 / 1 Passed

Note: These tests may not be considered while scoring. Know more.

Public Test Cases	Input	Expected Output	Actual Output	Status
Test Case 1	NA	Thread using Runnable interface.	Thread using Runnable interface.	Passed

Week 06 : Programming Assignment 3

Due on 2025-03-06, 23:59 IST

A part of the Java program is given, which can be completed in many ways, for example using the concept of thread, etc. Follow the given code and complete the program so that your program prints the message "NPTEL Java". Your program should utilize the given interface/ class.

Your last recorded submission was on 2025-02-21, 08:05 IST

Select the Language for this assignment.

File name for this program :

// Interface A is defined with an abstract method run()
interface A {
    public abstract void run();
}
 
// Class B is defined which implements A and an empty implementation of run()
class B implements A {
    public void run() {}
}

class MyThread extends B {
    // run() is overriden and 'NPTEL Java' is printed.
    public void run() {
        System.out.print("NPTEL Java");
    }
}

// Main class Question is defined
public class W06_P3{
     public static void main(String[] args) {
         // An object of MyThread class is created
         MyThread t = new MyThread();
         // run() of class MyThread is called
         t.run();
     }
}

You may submit any number of times before the due date. The final submission will be considered for grading.

Compilation : Passed
Public Test Cases: 1 / 1 Passed

Note: These tests may not be considered while scoring. Know more.

Public Test Cases	Input	Expected Output	Actual Output	Status
Test Case 1	NA	NPTEL Java	NPTEL Java	Passed

Week 06 : Programming Assignment 4

Due on 2025-03-06, 23:59 IST

Execution of two or more threads occurs in a random order. The keyword synchronized in Java is used to control the execution of threads in a specific sequence. In the following program, some numbers are expected to be printed. Use the synchronized keyword appropriately to ensure that the program prints the output in the following order:

-----------------OUTPUT-------------------

100

200

300

400

500

-------------------------------------------------

Your last recorded submission was on 2025-02-21, 08:08 IST

Select the Language for this assignment.

File name for this program :

class Execute{

// Just add 'synchronized' in the method
synchronized void print(int n){
   for(int i=1;i<=5;i++){  
     System.out.println(n*i);  
     try{  
      Thread.sleep(400);  
     }catch(Exception e){
        System.out.println(e);
     }  
   }
 }

} // Ending Execute class
 
class Thread1 extends Thread{  
    Execute t;  
    Thread1(Execute t){  
        this.t=t;  
    }  
    public void run(){  
        t.print(5);  
    } 
}  
 
class Thread2 extends Thread{  
    Execute t;  
    Thread2(Execute t){  
        this.t=t;  
    }  
    public void run(){  
        t.print(100);  
    }  
}  
  
public class W06_P4{  
    public static void main(String args[]){  
        Execute obj = new Execute();//only one object  
        Thread1 t1=new Thread1(obj);  
        Thread2 t2=new Thread2(obj);  
        t1.start();  
        t2.start();  
    }  
}

You may submit any number of times before the due date. The final submission will be considered for grading.

Compilation : Passed
Public Test Cases: 1 / 1 Passed

Note: These tests may not be considered while scoring. Know more.

Public Test Cases	Input	Expected Output	Actual Output	Status
Test Case 1	NA	5\n 10\n 15\n 20\n 25\n 100\n 200\n 300\n 400\n 500	5\n 10\n 15\n 20\n 25\n 100\n 200\n 300\n 400\n 500\n	Passed after ignoring Presentation Error

Week 06 : Programming Assignment 5

Due on 2025-03-06, 23:59 IST

Add necessary codes to print the following:

-----------------OUTPUT-------------------

Name of thread 't':Thread-0

New name of thread 't':NPTEL

Thread is running.

-------------------------------------------------

Your last recorded submission was on 2025-02-21, 08:09 IST

Select the Language for this assignment.

File name for this program :

class W06_P5 extends Thread{  
  public void run(){  
    System.out.println("Thread is running.");  
  }  
 public static void main(String args[]){  
    W06_P5 t=new W06_P5();  
    System.out.println("Name of thread 't':"+ t.getName());

// start the thread  
  t.start();  
// set the name
  t.setName("NPTEL");

System.out.println("New name of thread 't':"+ t.getName());  
 }  
}

You may submit any number of times before the due date. The final submission will be considered for grading.

Compilation : Passed
Public Test Cases: 1 / 1 Passed

Note: These tests may not be considered while scoring. Know more.

Public Test Cases	Input	Expected Output	Actual Output	Status
Test Case 1	NA	Name of thread 't':Thread-0\n New name of thread 't':NPTEL\n Thread is running.	Name of thread 't':Thread-0\n New name of thread 't':NPTEL\n Thread is running.\n	Passed after ignoring Presentation Error

Public Test Cases

Input

Expected Output

Actual Output

Status

Test Case 1

NA

Name of thread 't':Thread-0\n
New name of thread 't':NPTEL\n
Thread is running.

Name of thread 't':Thread-0\n
New name of thread 't':NPTEL\n
Thread is running.\n

Passed after ignoring Presentation Error

Week 07 : Programming Assignment 1

Due on 2025-03-13, 23:59 IST

Implement a Simple Calculator

A Calculator class is provided. Your task is to implement the following:

A parameterized constructor to initialize two numbers.
Methods for addition, subtraction, multiplication, and division.
The division method should handle division by zero and print "Cannot divide by zero!" if attempted.

Follow the naming conventions in the given template code.

Your last recorded submission was on 2025-03-12, 07:12 IST

Select the Language for this assignment.

File name for this program :

import java.util.Scanner;
 
class W07_1 {
    private int num1;
    private int num2;

// Constructor to initialize the numbers
    public W07_1(int num1, int num2) {
        this.num1 = num1;
        this.num2 = num2;
    }
// Method for addition
    public int add() {
        return num1 + num2;
    }
    // Method for subtraction
    public int subtract() {
        return num1 - num2;
    }
    // Method for multiplication
    public int multiply() {
        return num1 * num2;
    }
    // Method for division, handles division by zero
    public int divide() {
        if (num2 == 0) {
            System.out.println("Cannot divide by zero!");
            return 0; // You might want to return a different value or throw an exception
        }
        return num1 / num2;
    }

public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        int a = scanner.nextInt();
        int b = scanner.nextInt();
 
        W07_1 calc = new W07_1(a, b);
        System.out.println("Sum: " + calc.add());
        System.out.println("Difference: " + calc.subtract());
        System.out.println("Product: " + calc.multiply());
        System.out.println("Quotient: " + calc.divide());
 
        scanner.close();
    }
}

You may submit any number of times before the due date. The final submission will be considered for grading.

Compilation : Passed
Public Test Cases: 1 / 1 Passed

Note: These tests may not be considered while scoring. Know more.

Public Test Cases	Input	Expected Output	Actual Output	Status
Test Case 1	10 5	Sum: 15\n Difference: 5\n Product: 50\n Quotient: 2	Sum: 15\n Difference: 5\n Product: 50\n Quotient: 2\n	Passed after ignoring Presentation Error

Week 07 : Programming Assignment 2

Due on 2025-03-13, 23:59 IST

Implement a Simple Counter

A Counter class is provided. Implement:

A constructor initializing the counter to zero.
Methods to increment(), decrement(), and getValue().
Ensure the counter does not go below zero.

Your last recorded submission was on 2025-03-12, 07:18 IST

Select the Language for this assignment.

File name for this program :

import java.util.Scanner;
 
class Counter {
    private int count;

// Constructor to initialize the counter to zero
    public Counter() {
        count = 0;
    }
    // Method to increment the counter by 1
    public void increment() {
        count++;
    }
    // Method to decrement the counter by 1, ensuring it does not go below zero
    public void decrement() {
        if (count > 0) {
            count--;
        }
    }
    // Method to return the current value of the counter
    public int getValue() {
        return count;
    }

}
public class W07_2 {
    public static void main(String[] args) {
        Counter counter = new Counter();
        counter.increment();
        counter.increment();
        counter.decrement();
        System.out.println(counter.getValue()); // Output: 1
    }
}

You may submit any number of times before the due date. The final submission will be considered for grading.

Compilation : Passed
Public Test Cases: 1 / 1 Passed

Note: These tests may not be considered while scoring. Know more.

Public Test Cases	Input	Expected Output	Actual Output	Status
Test Case 1	NA	1	1\n	Passed after ignoring Presentation Error

Week 07 : Programming Assignment 3

Due on 2025-03-13, 23:59 IST

Implement a Basic Employee Class

An Employee class is provided. Implement:

A constructor to initialize name and salary.
A method getDetails() to return "Employee: Name, Salary: X" format.

Example Input:
Alice 50000

Example Output:
Employee: Alice, Salary: 50000

Your last recorded submission was on 2025-03-12, 07:20 IST

Select the Language for this assignment.

File name for this program :

import java.util.Scanner;
 
class Employee {
    private String name;
    private double salary;

// Constructor to initialize name and salary
    public Employee(String name, double salary) {
        this.name = name;
        this.salary = salary;
    }
    // Method to return employee details in the required format
    public String getDetails() {
        return "Employee: " + name + ", Salary: " + salary;
    }
}

public class W07_3 {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        String empName = scanner.next();
        double empSalary = scanner.nextDouble();
 
        Employee emp = new Employee(empName, empSalary);
        System.out.print(emp.getDetails());
 
        scanner.close();
    }
}

You may submit any number of times before the due date. The final submission will be considered for grading.

Compilation : Passed
Public Test Cases: 1 / 1 Passed

Note: These tests may not be considered while scoring. Know more.

Public Test Cases	Input	Expected Output	Actual Output	Status
Test Case 1	Deepak 50000	Employee: Deepak, Salary: 50000.0	Employee: Deepak, Salary: 50000.0	Passed

Week 07 : Programming Assignment 4

Due on 2025-03-13, 23:59 IST

Implement a Simple Array Processor

You need to complete the implementation of the `getMax()` method inside the `NumberArray` class. This method should return the largest number from the array.

Tasks:

Complete the `getMax()` method in the template section.
The method should iterate through the array and find the largest value.

Example Input:

3 8 1 5 7

Example Output:
Max: 8, Min: 1

Your last recorded submission was on 2025-03-12, 07:24 IST

Select the Language for this assignment.

File name for this program :

import java.util.Scanner;
 
 
 
// Class to store and process an array of numbers
class NumberArray {
    private int[] numbers; // This array will store the numbers given by the user
 
    // Constructor to initialize the array
    public NumberArray(int[] numbers) {
        this.numbers = numbers;
    }

// Method to find and return the largest number in the array
    public int getMax() {
        int max = numbers[0]; // Initialize max with the first element
        for (int num : numbers) {
            if (num > max) {
                max = num; // Update max if a larger number is found
            }
        }
        return max; // Return the largest number found
    }
    // Method to find and return the smallest number in the array
    public int getMin() {
        int min = numbers[0]; // Assume the first element is the smallest
        for (int num : numbers) {
            if (num < min) {
                min = num;
            }
        }
        return min; // Return the smallest number found
    }
}

// ==========================================================
// Main class to test the NumberArray class
public class W07_4 {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
 
        // Read 5 integers from the user and store them in an array
        int[] arr = new int[5]; // Create an array of size 5
        for (int i = 0; i < arr.length; i++) {
            arr[i] = scanner.nextInt(); // Read numbers from user
        }
 
        // Create an instance of NumberArray and print max & min values
        NumberArray numArray = new NumberArray(arr);
        System.out.println("Max: " + numArray.getMax() + ", Min: " + numArray.getMin());
 
        scanner.close(); // Close scanner to free resources
    }
}

You may submit any number of times before the due date. The final submission will be considered for grading.

Compilation : Passed
Public Test Cases: 1 / 1 Passed

Note: These tests may not be considered while scoring. Know more.

Public Test Cases	Input	Expected Output	Actual Output	Status
Test Case 1	3 8 1 5 7	Max: 8, Min: 1	Max: 8, Min: 1\n	Passed after ignoring Presentation Error

Week 07 : Programming Assignment 5

Due on 2025-03-13, 23:59 IST

Implement a Simple Password Validator

In this task, you need to implement a password validation system using Java. The goal is to check if a given password meets the following conditions:

Minimum Length Requirement: The password must be at least 8 characters long.
Uppercase Letter Requirement: The password must contain at least one uppercase letter (A-Z).
Number Requirement: The password must contain at least one numeric digit (0-9).

If the password meets all three conditions, print "Valid Password". Otherwise, print "Invalid Password".

Input Format:

A single string representing the password (can contain alphabets, numbers, and special characters).

Output Format:

Print "Valid Password" if the password satisfies all the conditions.
Otherwise, print "Invalid Password".

Example Input:
Password123

Example Output:
Valid Password

Your last recorded submission was on 2025-03-12, 07:27 IST

Select the Language for this assignment.

File name for this program :

import java.util.Scanner;
 
public class W07_5 {
    private String password;
 
    // Step 1: Constructor to initialize the password variable
    public W07_5(String password) { 
        this.password = password; // Assign the passed password to the instance variable
    }
    // ================================
    // Note: Try solving it without hints first-only check if you're truly stuck.
    // Avoid AI or internet searches; quick answers won't build real skills.
    // Struggle a bit, learn for life! Be honest with yourself!
    //

    public boolean isValidPassword(String p) {
        // Step 1: Check if the password length is at least 8 characters
        if (password.length() < 8) {
            return false;
        }
        // Flag to track if there is an uppercase letter
        boolean hasUpperCase = false;
        // Flag to track if there is a number
        boolean hasDigit = false;
        // Step 2: Loop through each character in the password
        for (char ch : password.toCharArray()) {
            if (Character.isUpperCase(ch)) {
                hasUpperCase = true; // Found an uppercase letter
            }
            if (Character.isDigit(ch)) {
                hasDigit = true; // Found a number
            }
            // If both conditions are met, no need to check further
            if (hasUpperCase && hasDigit) {
                return true;
            }
        }
        // Step 3: If either condition is not met, return false
        return false;
    }

public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        // Read password input from user
        String inputPassword = scanner.nextLine();
        scanner.close();
        W07_5 validator = new W07_5(inputPassword);
        
        // Check password validity and print result
        if (validator.isValidPassword(inputPassword)) {
            System.out.print("Valid Password");
        } else {
            System.out.print("Invalid Password");
        }
  
        scanner.close();
    }
  }

You may submit any number of times before the due date. The final submission will be considered for grading.

Compilation : Passed
Public Test Cases: 1 / 1 Passed

Note: These tests may not be considered while scoring. Know more.

Public Test Cases	Input	Expected Output	Actual Output	Status
Test Case 1	Password123	Valid Password	Valid Password	Passed

Week 08 : Programming Assignment 1

Due on 2025-03-20, 23:59 IST

Write a Java program that reads a positive integer from the user and computes the sum of its digits.

Expected Input/Output:

Input: 123

Output: 6

Your last recorded submission was on 2025-03-15, 15:52 IST

Select the Language for this assignment.

File name for this program :

import java.util.Scanner;
 
public class W08_P1 {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        
        
        int number = scanner.nextInt();

        int sum = 0;
        while (number > 0) {
            int digit = number % 10; // Extract the last digit
            sum += digit; // Add the digit to the sum
            number /= 10; // Remove the last digit
        }
        System.out.print(sum);

scanner.close();
    }
}

You may submit any number of times before the due date. The final submission will be considered for grading.

Compilation : Passed
Public Test Cases: 1 / 1 Passed

Note: These tests may not be considered while scoring. Know more.

Public Test Cases	Input	Expected Output	Actual Output	Status
Test Case 1	640	10	10	Passed

Week 08 : Programming Assignment 2

Due on 2025-03-20, 23:59 IST

Write a Java program that reads an integer from the user and computes its factorial.

Factorial of a number n is calculated as: n! = n * (n-1) * (n-2) * ... * 1

Assume the input is a non-negative integer.

Select the Language for this assignment.

File name for this program :

import java.util.Scanner;
 
public class W08_P2 {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        
       
        int n = scanner.nextInt();

        long factorial = 1;
        if (n == 0) {
            factorial = 1;
        } else {
            for (int i = 1; i <= n; i++) {
                factorial *= i;
            }
        }
        System.out.print(factorial);

scanner.close();
    }
}

You may submit any number of times before the due date. The final submission will be considered for grading.

Compilation : Passed
Public Test Cases: 1 / 1 Passed

Note: These tests may not be considered while scoring. Know more.

Public Test Cases	Input	Expected Output	Actual Output	Status
Test Case 1	5	120	120	Passed

Week 08 : Programming Assignment 3

Due on 2025-03-20, 23:59 IST

Write a Java program that reads a positive integer from the user and prints its reverse.

Expected Input/Output:

Input: 1234

Output: 4321

Your last recorded submission was on 2025-03-15, 16:15 IST

Select the Language for this assignment.

File name for this program :

import java.util.Scanner;
 
public class W08_P3 {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        
        
        int number = scanner.nextInt();

        int reversedNumber = 0;
        while (number != 0) {
            int digit = number % 10;
            reversedNumber = reversedNumber * 10 + digit;
            number /= 10;
        }
        System.out.print(reversedNumber);

scanner.close();
    }
}

You may submit any number of times before the due date. The final submission will be considered for grading.

Compilation : Passed
Public Test Cases: 1 / 1 Passed

Note: These tests may not be considered while scoring. Know more.

Public Test Cases	Input	Expected Output	Actual Output	Status
Test Case 1	1005	5001	5001	Passed

Week 08 : Programming Assignment 4

Due on 2025-03-20, 23:59 IST

Write a Java program that reads an integer and determines if it is a prime number.

A prime number is only divisible by 1 and itself.

Expected Input/Output:

Input: 7

Output: Prime

Select the Language for this assignment.

File name for this program :

import java.util.Scanner;
 
public class W08_P4 {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        
        
        int number = scanner.nextInt();

        if (number < 2) {
            System.out.print("Not Prime");
        } else {
            boolean isPrime = true;
            for (int i = 2; i <= Math.sqrt(number); i++) {
                if (number % i == 0) {
                    isPrime = false;
                    break;
                }
            }
            if (isPrime) {
                System.out.print("Prime");
            } else {
                System.out.print("Not Prime");
            }
        }

scanner.close();
    }
}

You may submit any number of times before the due date. The final submission will be considered for grading.

Compilation : Passed
Public Test Cases: 1 / 1 Passed

Note: These tests may not be considered while scoring. Know more.

Public Test Cases	Input	Expected Output	Actual Output	Status
Test Case 1	10	Not Prime	Not Prime	Passed

Week 08 : Programming Assignment 5

Due on 2025-03-20, 23:59 IST

Write a Java program to perform matrix multiplication.
The program should:

- Read two matrices from user input.
- Validate that matrix multiplication is possible (columns of first == rows of second).
- Compute the product of the matrices.
- Display the resulting matrix.

Expected Input/Output:

Input:

2 3 \ (Rows and Columns of first matrix)

1 2 3

4 5 6

3 2 \ (Rows and Columns of second matrix)

7 8

9 10

11 12

Output:

58 64

139 154

----------------------

Input:

2 2

1 2

3 4

2 2

2 0

1 3

Output:

4 6

10 12

Select the Language for this assignment.

File name for this program :

import java.util.Scanner;
 
public class W08_P5 {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        
        
        int rows1 = scanner.nextInt();
        int cols1 = scanner.nextInt();
        int[][] matrix1 = new int[rows1][cols1];
        for (int i = 0; i < rows1; i++) {
            for (int j = 0; j < cols1; j++) {
                matrix1[i][j] = scanner.nextInt();
            }
        }
        
        int rows2 = scanner.nextInt();
        int cols2 = scanner.nextInt();
        int[][] matrix2 = new int[rows2][cols2];
        for (int i = 0; i < rows2; i++) {
            for (int j = 0; j < cols2; j++) {
                matrix2[i][j] = scanner.nextInt();
            }
        }

        if (cols1 != rows2) {
            System.out.println("Multiplication Not Possible");
            return;
        }
        int[][] result = new int[rows1][cols2];
        for (int i = 0; i <  rows1 ; i++) {
            for (int j = 0; j <  cols2 ; j++) {
                for (int k = 0; k <  cols1 ; k++) {
                    result[i][j] +=  matrix1[i][k] * matrix2[k][j] ;
                }
            }
        }
        for (int i = 0; i < rows1; i++) {
            for (int j = 0; j <  cols2 ; j++) {
                System.out.print( result[i][j] );
                if (j < cols2 - 1) {
                    System.out.print(" "); // Ensure no trailing space at end of row
                }
            }
            System.out.println(); // Move to next row
        }

scanner.close();
    }
}

You may submit any number of times before the due date. The final submission will be considered for grading.

Compilation : Passed
Public Test Cases: 1 / 1 Passed

Note: These tests may not be considered while scoring. Know more.

Public Test Cases	Input	Expected Output	Actual Output	Status
Test Case 1	2 3 1 2 3 4 5 6 3 2 7 8 9 10 11 12	58 64\n 139 154	58 64\n 139 154\n	Passed after ignoring Presentation Error

Week 09 : Programming Assignment 1

Due on 2025-03-27, 23:59 IST

Write suitable code to develop a 2D Flip-Flop Array with dimension 5 × 5, which replaces all input elements with values 0 by 1 and 1 by 0. An example is shown below:

INPUT:
00001
00001
00001
00001
00001

OUTPUT:

11110
11110
11110
11110
11110

Note the following points carefully:
1. Here, the input must contain only 0 and 1.

2. The input and output array size must be of dimension 5 × 5.
3. Flip-Flop: If 0 then 1 and vice-versa.

Select the Language for this assignment.

File name for this program :

import java.util.Scanner;
public class Question91{
    public static void main(String args[]){
        Scanner sc = new Scanner(System.in);

// Declare the 5X5 2D array to store the input
        char original[][]= new char[5][5];
        // Input 2D Array using Scanner Class and check data validity
        for(int line=0;line<5; line++){
            String input = sc.nextLine();
            char seq[] = input.toCharArray();
            if(seq.length==5){
                for(int i=0;i<5;i++){
                    if(seq[i]=='0' || seq[i]=='1'){
                        original[line][i]=seq[i];
                        if(line==4 && i==4)
                            flipflop(original);
                    }
                    else{
                        System.out.print("Only 0 and 1 supported.");
                        break;
                    }
                }
            }else{
                System.out.print("Invalid length");
                break;
            }
        }
    }
    static void flipflop(char[][] flip){
        // Flip-Flop Operation
        for(int i=0; i<5;i++){
            for(int j=0; j<5;j++){      
                if(flip[i][j]=='1')
                    flip[i][j]='0';
                else
                    flip[i][j]='1';
            }
        }
        // Output the 2D FlipFlopped Array
        for(int i=0; i<5;i++){
            for(int j=0; j<5;j++){      
                System.out.print(flip[i][j]);
            }
            System.out.println();
        }

} // The main() ends here
} // The main class ends here

You may submit any number of times before the due date. The final submission will be considered for grading.

Compilation : Passed
Public Test Cases: 1 / 1 Passed

Note: These tests may not be considered while scoring. Know more.

Public Test Cases	Input	Expected Output	Actual Output	Status
Test Case 1	00001 00001 00001 00001 00001	11110\n 11110\n 11110\n 11110\n 11110	11110\n 11110\n 11110\n 11110\n 11110\n	Passed after ignoring Presentation Error

Week 09 : Programming Assignment 2

Due on 2025-03-27, 23:59 IST

A program needs to be developed which can mirror reflect any 5 × 5 2D character array into its side-by-side reflection. Write suitable code to achieve this transformation as shown below:

INPUT: OUTPUT:
OOXOO OOXOO
OOXOO OOXOO
XXXOO OOXXX
OOOOO OOOOO
XOABC CBAOX

Note the following points carefully:
1. Here, instead of X and O any character may be present.

2. The input and output array size must be of dimension 5 × 5 and nothing else.
3. Only side-by-side reflection should be performed i.e. ABC || CBA.

Select the Language for this assignment.

File name for this program :

import java.util.Scanner;
public class Question92{
    public static void main(String args[]){
        Scanner sc = new Scanner(System.in);

// Declaring 5x5 2D char array to store input
        char original[][]= new char[5][5];
        // Declaring 5x5 2D char array to store reflection
        char reflection[][]= new char[5][5];
        // Input 2D Array using Scanner Class
        for(int line=0;line<5; line++){
            String input = sc.nextLine();
            char seq[] = input.toCharArray();
            if(seq.length==5){
                for(int i=0;i<5;i++){
                    original[line][i]=seq[i];
                }
            }
        }
        // Performing the reflection operation
        for(int i=0; i<5;i++){
            for(int j=0; j<5;j++){      
                reflection[i][j]=original[i][4-j];
            }
        }
        // Output the 2D Reflection Array
        for(int i=0; i<5;i++){
            for(int j=0; j<5;j++){      
                System.out.print(reflection[i][j]);
            }
            System.out.println();
        }

} // The main() method ends here
} // The main class end

You may submit any number of times before the due date. The final submission will be considered for grading.

Compilation : Passed
Public Test Cases: 1 / 1 Passed

Note: These tests may not be considered while scoring. Know more.

Public Test Cases	Input	Expected Output	Actual Output	Status
Test Case 1	OOXOO OOXOO XXXOO OOOOO XOABC	OOXOO\n OOXOO\n OOXXX\n OOOOO\n CBAOX	OOXOO\n OOXOO\n OOXXX\n OOOOO\n CBAOX\n	Passed after ignoring Presentation Error

Week 09 : Programming Assignment 3

Due on 2025-03-27, 23:59 IST

Complete the code to perform a 45 degree anti clock wise rotation with respect to the center of a 5 × 5 2D Array as shown below:

INPUT:

00100

11111

00100

OUTPUT:

10001

01010

00100

01010

10001

Note the following points carefully:
1. Here, instead of 0 and 1 any character may be given.

2. The input and output array size must be of dimension 5 × 5 and nothing else.

Select the Language for this assignment.

File name for this program :

import java.util.Scanner;
public class Question93{
    public static void main(String args[]){
        Scanner sc = new Scanner(System.in);

char arr[][]= new char[5][5];
            // Input 2D Array using Scanner Class
            for(int line=0;line<5; line++){
                String input = sc.nextLine();
                char seq[] = input.toCharArray();
                if(seq.length==5){
                    for(int i=0;i<5;i++){
                        arr[line][i]=seq[i];
                    }
                }else{
                    System.out.print("Wrong Input!");
                    System.exit(0);
                }
            }
            // Declaring the array to store Transition
            char tra[][] = new char[5][5];
            String outer[]={"00","10","20","30",
                            "40","41","42","43",
                            "44","34","24","14",
                            "04","03","02","01"};           
            String inner[]={"11","21","31","32",
                            "33","23","13","12"};
            // 45-Degree rotation
            for(int i=0;i<5;i++){
                for(int j=0;j<5;j++){
                    // Transform outer portion
                    for(int k=0; k<outer.length; k++){
                        char indices[]=outer[k].toCharArray();
                        int a = Integer.parseInt(String.valueOf(indices[0]));
                        int b = Integer.parseInt(String.valueOf(indices[1]));
                        if(a==i && b==j){
                            if(k==15){k=1;}
                            else if(k==14){k=0;}
                            else {k+=2;}
                            indices=outer[k].toCharArray();
                            a = Integer.parseInt(String.valueOf(indices[0]));
                            b = Integer.parseInt(String.valueOf(indices[1]));
                            tra[a][b] = arr[i][j];
                            break;
                        }
                    }
                    // Transform inner portion
                    for(int k=0; k<inner.length; k++){
                        char indices[]=inner[k].toCharArray();
                        int a = Integer.parseInt(String.valueOf(indices[0]));
                        int b = Integer.parseInt(String.valueOf(indices[1]));
                        if(a==i && b==j){
                            if(k==7){k=0;}
                            else {k+=1;}
                            indices=inner[k].toCharArray();
                            a = Integer.parseInt(String.valueOf(indices[0]));
                            b = Integer.parseInt(String.valueOf(indices[1]));
                            tra[a][b] = arr[i][j];
                            break;
                        }
                    }
                    // Keeping center same
                    tra[2][2] = arr[2][2];
                }
            }
            // Print the transformed output 
            for(int i=0;i<5;i++){
                for(int j=0;j<5;j++){
                    System.out.print(tra[i][j]);
                }
                System.out.println();
            }

} // The main() method ends here
} // The main class ends here

You may submit any number of times before the due date. The final submission will be considered for grading.

Compilation : Passed
Public Test Cases: 1 / 1 Passed

Note: These tests may not be considered while scoring. Know more.

Public Test Cases	Input	Expected Output	Actual Output	Status
Test Case 1	00100 00100 11111 00100 00100	10001\n 01010\n 00100\n 01010\n 10001	10001\n 01010\n 00100\n 01010\n 10001\n	Passed after ignoring Presentation Error

Week 09 : Programming Assignment 4

Due on 2025-03-27, 23:59 IST

Complete the code to develop an ADVANCED CALCULATOR that emulates all the functions of the GUI Calculator as shown in the image.

Note the following points carefully:
1. Use only double datatype to store all numeric values.
2. Each button on the calculator should be operated by typing the characters from 'a' to 'p'.
3. To calculate 25-6, User should input fjhkc (where, f for 2, j for 5, h for '-', k for 6 and c for '=' ).
3. You may use the already defined function gui_map(char).
4. Without '=', operations won't give output as shown in Input_2 and Output_2 example below.
5. The calculator should be able to perform required operations on two operands as shown in the below example:

Input_1:
klgc

Output_1:
18.0

Select the Language for this assignment.

File name for this program :

import java.util.Scanner;
public class Question94{
    public static void main(String args[]){
        Scanner sc = new Scanner(System.in);
        String input = sc.nextLine();

        char seq[] = input.toCharArray();
        int outflag=0;
        // Start the mapping process for each input character
        for(int i=0; i<seq.length; i++){
            seq[i]=gui_map(seq[i]);
        }
        //Print Mapped GUI (remove comment to see the mapped sequence input)
        /*
        for(int i=0; i<seq.length; i++){
            System.out.print(seq[i]);
        }
        */
        // Use double type of values for entire calculation
        double operand1=0.0;
        String o1="";
        double operand2=0.0;
        String o2="";
        double output=0.0;
        // Perform calculaton operations
        outerloop:
        for(int i=0; i<seq.length; i++){
            int r=0;
            if(seq[i]=='+'||seq[i]=='-'||seq[i]=='/'||seq[i]=='X'||seq[i]=='='){
                for(int j=0; j<i; j++){
                    o1+=Character.toString(seq[j]);
                }
                operand1=Double.parseDouble(o1);
                for(int k=i+1; k<seq.length; k++){
                    if(seq[k]=='='){
                        outflag=1;
                        operand2=Double.parseDouble(o2);
                        if(seq[i]=='+'){
                            output=operand1+operand2;
                        }else if(seq[i]=='-'){
                            output=operand1-operand2;
                        }else if(seq[i]=='/'){
                            output=operand1/operand2;
                        }else if(seq[i]=='X'){
                            output=operand1*operand2;
                        }
                        break outerloop;
                    }else{
                        o2+=Character.toString(seq[k]);
                    }
                }
            }
        }
        // Check if output is available and print the output
        if(outflag==1)
            System.out.print(output);

}// The main() method ends here.
    
// A method that takes a character as input and returns the corresponding GUI character 
    static char gui_map(char in){
        char out = 'N';// N = Null/Empty
        char gm[][]={{'a','.'}
                    ,{'b','0'}
                    ,{'c','='}
                    ,{'d','+'}
                    ,{'e','1'}
                    ,{'f','2'}
                    ,{'g','3'}
                    ,{'h','-'}
                    ,{'i','4'}
                    ,{'j','5'}
                    ,{'k','6'}
                    ,{'l','X'}
                    ,{'m','7'}
                    ,{'n','8'}
                    ,{'o','9'}
                    ,{'p','/'}};
                    
        // Checking for maps
        for(int i=0; i<gm.length; i++){
            if(gm[i][0]==in){
                out=gm[i][1];
                break;
            }
        }
        return out;
    }
}

You may submit any number of times before the due date. The final submission will be considered for grading.

Compilation : Passed
Public Test Cases: 1 / 1 Passed

Note: These tests may not be considered while scoring. Know more.

Public Test Cases	Input	Expected Output	Actual Output	Status
Test Case 1	klgc	18.0	18.0	Passed

Week 09 : Programming Assignment 5

Due on 2025-03-27, 23:59 IST

Complete the code to develop a BASIC CALCULATOR that can perform operations like Addition, Subtraction, Multiplication and Division.

Note the following points carefully:
1. Use only double datatype to store calculated numeric values.
2. Assume input to be of integer datatype.
3. The output should be rounded using Math.round() method.
4. Take care of the spaces during formatting output (e.g., single space each before and after =).
5. The calculator should be able to perform required operations on a minimum of two operands as shown in the below example:

Input:
5+6

Output:
5+6 = 11

Select the Language for this assignment.

File name for this program :

import java.util.Scanner;
public class Question95{
    public static void main(String args[]){
        Scanner sc = new Scanner(System.in);
        String input = sc.nextLine(); // Read as string, e.g., 5+6

        // Declare and initialize the required variable(s)
        int i=0;
        int j=0;
        double output=0;
        // Split the input string into character array
        char seq[] = input.toCharArray();
        /*
        Use some method to separate the two operands
        and then perform the required operation.
        */
        for(int a=0; a<seq.length; a++){
            if(seq[a]=='+'){
                i= Integer.parseInt(input.substring(0,a));
                j= Integer.parseInt(input.substring(a+1,seq.length));
                output = (double)i+j;
            }else if(seq[a]=='-'){
                i= Integer.parseInt(input.substring(0,a));
                j= Integer.parseInt(input.substring(a+1,seq.length));
                output = (double)i-j;
            }else if(seq[a]=='/'){
                i= Integer.parseInt(input.substring(0,a));
                j= Integer.parseInt(input.substring(a+1,seq.length));
                output = (double)i/j;
            }else if(seq[a]=='*'){
                i= Integer.parseInt(input.substring(0,a));
                j= Integer.parseInt(input.substring(a+1,seq.length));
                output = (double)i*j;
            }
        }
        // Print the output as stated in the question
        System.out.print(input+" = " + Math.round(output));

}
}

You may submit any number of times before the due date. The final submission will be considered for grading.

Compilation : Passed
Public Test Cases: 1 / 1 Passed

Note: These tests may not be considered while scoring. Know more.

Public Test Cases	Input	Expected Output	Actual Output	Status
Test Case 1	5+6	5+6 = 11	5+6 = 11	Passed

Week 10 : Programming Assignment 1

Due on 2025-04-03, 23:59 IST

Import the Right Packages

Write a Java program that connects to a database using JDBC (Java Database Connectivity).
However, the code will not compile unless you import the correct packages.
Your task is to add the correct import statements so that the program compiles and runs properly.

Even if you have never worked with JDBC, this is a basic puzzle-style task.
Simply use your understanding of Java import statements and hints in the code to figure out what to include at the top.

📌 Hint: JDBC is part of java.sql, and you might need java.lang too (which is imported automatically, but keep it for good practice).

Your last recorded submission was on 2025-03-29, 16:09 IST

Select the Language for this assignment.

File name for this program :

// ================================================
// NOTE TO STUDENTS:
// Try to solve the task on your own before referring to external help.
// Avoid using online answers or tools unless absolutely necessary.
// Struggling with the problem is a part of the learning process and will help you build long-term understanding.
// ================================================
 
// TODO: Add the necessary import statements below so that the program can compile and connect to a database using JDBC.
 
/*
 What is this program about?
 - The goal is to write a Java program that establishes a database connection using JDBC (Java Database Connectivity).
 
 Why are import statements important?
 - In Java, import statements allow you to use classes and interfaces that are part of external packages.
 - If required classes are not imported, the program will not compile.
 
 How should you approach this?
 - Read through the code and identify which classes are being used.
 - Determine which packages these classes belong to.
 
 Helpful guidelines:
 - All JDBC-related classes such as Connection and DriverManager are found in the java.sql package.
 - The java.lang package is automatically imported, but can be explicitly mentioned for clarity.
 
 Example:
 - If you see a class like Connection being used, import it using:
   import java.sql.Connection;
 
 Your task:
 - Identify the required classes.
 - Import them from the correct packages using proper syntax.
 - Do not include unnecessary imports.
*/
import java.sql.Connection;
import java.sql.DriverManager;

public class W10_P1 {
    public static void main(String args[]) {
        try {
            Connection conn = null;
            String DB_URL = "jdbc:sqlite:/tempfs/db";
            System.setProperty("org.sqlite.tmpdir", "/tempfs");
 
            // Try to connect to the database
            conn = DriverManager.getConnection(DB_URL);
            System.out.print(conn.isValid(1));
 
            conn.close();
        } catch (Exception e) {
            System.out.println(e);
        }
    }
}

You may submit any number of times before the due date. The final submission will be considered for grading.

Compilation : Passed
Public Test Cases: 1 / 1 Passed

Note: These tests may not be considered while scoring. Know more.

Public Test Cases	Input	Expected Output	Actual Output	Status
Test Case 1	NA	true	true	Passed

Week 10 : Programming Assignment 2

Due on 2025-04-03, 23:59 IST

Check if a JDBC Driver is Available

Java uses JDBC drivers to connect to different databases.
Each database (like SQLite, MySQL, PostgreSQL, etc.) has its own JDBC driver.

This program checks whether the SQLite JDBC driver is available in the classpath.
To do that, Java uses Class.forName(...) to try to load the driver class by its name.

Your task is to complete one line of code to load the SQLite driver and print true if the driver is successfully loaded.

This is a common step when using JDBC in real-world applications, and this exercise helps you get comfortable with how drivers are managed.

Your last recorded submission was on 2025-03-29, 11:45 IST

Select the Language for this assignment.

File name for this program :

import java.sql.*;  // Import required for JDBC classes
 
public class W10_P2 {
    public static void main(String[] args) {
        try {
            // We will attempt to load the SQLite JDBC driver class.
            // If successful, we'll print true.
            // If the driver class isn't available, we'll catch the error and print false.

// ================================================
            // NOTE TO STUDENTS:
            // Try to solve the task on your own before referring to external help.
            // Avoid using online sources or tools unless absolutely necessary.
            // Engaging with the problem independently will improve your understanding and confidence.
            // ================================================
 
            // TODO: Load the JDBC driver class for SQLite using Class.forName
 
            /*
             Hint (read only if necessary):
             - The Class.forName() method is used to load a class at runtime by its fully qualified name.
             - For the SQLite JDBC driver, the class name to load is: "org.sqlite.JDBC"
             
             Pseudocode:
             Class.forName("org.sqlite......");
            */
Class.forName("org.sqlite.JDBC");

// If the driver loads successfully, this line will execute.
            System.out.println(true);
        } catch (Exception e) {
            // If there is any error in loading the driver, this line will execute.
            System.out.println(false);
        }
    }
}

You may submit any number of times before the due date. The final submission will be considered for grading.

Compilation : Passed
Public Test Cases: 1 / 1 Passed

Note: These tests may not be considered while scoring. Know more.

Public Test Cases	Input	Expected Output	Actual Output	Status
Test Case 1	NA	true	true\n	Passed after ignoring Presentation Error

Week 10 : Programming Assignment 3

Due on 2025-04-03, 23:59 IST

Connect to a SQLite Database Using JDBC

Once a JDBC driver is available, the next step is to establish a connection to a database.
In this task, your job is to connect to a SQLite database using the correct JDBC method.

Java provides the class DriverManager with a method getConnection(String url) to establish the connection.

Your task is to complete the program by writing one line that uses DriverManager.getConnection(...) to connect to the database.

You are not required to write any SQL queries or manage database content.
The focus is on learning how to establish a basic JDBC connection.

Your last recorded submission was on 2025-03-29, 16:13 IST

Select the Language for this assignment.

File name for this program :

import java.sql.*; // Required for JDBC classes like Connection and DriverManager
 
public class W10_P3 {
    public static void main(String[] args) {
        try {
            // Set up a Connection reference to hold the database connection
            Connection conn = null;
 
            // JDBC URL string pointing to the SQLite database path
            String DB_URL = "jdbc:sqlite:/tempfs/studentdb";
 
            // This line sets a temporary directory for SQLite to avoid permission issues
            System.setProperty("org.sqlite.tmpdir", "/tempfs");

// ================================================
            // NOTE TO STUDENTS:
            // Try to solve the task on your own before referring to external help.
            // Avoid using online sources or tools unless absolutely necessary.
            // Engaging with the problem independently will improve your understanding and confidence.
            // ================================================
 
            // TODO: Establish a connection to the database using DriverManager.getConnection
 
            /*
             Hint (only if needed):
             - Use DriverManager.getConnection(...) method and pass DB_URL as the argument
             - Assign the returned Connection object to the variable 'conn'
 
             Pseudocode:
             conn = DriverManager.getConnection(......_URL);
            */
conn = DriverManager.getConnection(DB_URL);

// If the connection is successful, conn.isValid(1) will return true
            System.out.println(conn.isValid(1));
 
            // Always close the connection after use
            conn.close();
        } catch (Exception e) {
            System.out.println(e);
        }
    }
}

You may submit any number of times before the due date. The final submission will be considered for grading.

Compilation : Passed
Public Test Cases: 1 / 1 Passed

Note: These tests may not be considered while scoring. Know more.

Public Test Cases	Input	Expected Output	Actual Output	Status
Test Case 1	NA	true	true\n	Passed after ignoring Presentation Error

Week 10 : Programming Assignment 4

Due on 2025-04-03, 23:59 IST

Create a Table in a SQLite Database Using JDBC

Once a connection to a database is established, SQL commands can be executed using JDBC.
In this task, your job is to create a table named `students` with the following columns:
`roll` – an integer that represents the student’s roll number
`name` – a string (up to 30 characters) representing the student’s name
You will complete one line of code that executes a SQL `CREATE TABLE` statement using a `Statement` object.
You are not required to insert or retrieve any data — only to create the table using proper JDBC methods.

Your last recorded submission was on 2025-03-29, 16:14 IST

Select the Language for this assignment.

File name for this program :

import java.sql.*; // Required for JDBC classes
 
public class W10_P4 {
    public static void main(String[] args) {
        try {
            // Set SQLite temp directory to avoid native driver errors in restricted environments
            System.setProperty("org.sqlite.tmpdir", "/tempfs");
 
            // Create a connection to the SQLite database
            Connection conn = DriverManager.getConnection("jdbc:sqlite:/tempfs/studentdb");
 
            // Create a Statement object to send SQL statements to the database
            Statement stmt = conn.createStatement();
 
            // SQL query string to create the 'students' table
            String sql = "CREATE TABLE students(roll INTEGER, name VARCHAR(30))";

// ================================================
            // NOTE TO STUDENTS:
            // Try to solve the task on your own before referring to external help.
            // Avoid using online sources or tools unless absolutely necessary.
            // Engaging with the problem independently will improve your understanding and confidence.
            // ================================================
 
            // TODO: Execute the SQL command to create the table using the Statement object
 
            /*
             Hint (if needed):
             - Use the executeUpdate(...) method of the Statement object
             - Pass the SQL string variable 'sql' as the argument
 
             Pseudocode:
             stmt.executeUpdate(...Todo....);
            */
stmt.executeUpdate(sql);

// If the table is created without exceptions, print success
            System.out.println("success");
 
            // Close statement and connection to release resources
            stmt.close();
            conn.close();
        } catch (Exception e) {
            System.out.println(e);
        }
    }
}

You may submit any number of times before the due date. The final submission will be considered for grading.

Compilation : Passed
Public Test Cases: 1 / 1 Passed

Note: These tests may not be considered while scoring. Know more.

Public Test Cases	Input	Expected Output	Actual Output	Status
Test Case 1	NA	success	success\n	Passed after ignoring Presentation Error

Week 10 : Programming Assignment 5

Due on 2025-04-03, 23:59 IST

Insert a Record into a Table Using JDBC

Once a table is created in a database, we can insert records into it using SQL `INSERT` statements.
In this task, your goal is to insert a single student record into the existing `students` table.
You are provided with the following variables:
`roll` – an integer roll number
`name` – a string representing the student’s name
Your task is to write one line of code that inserts this data into the table using a `PreparedStatement`.
This is a common and safe way to insert data, as it avoids issues like SQL injection and improper formatting.

Your last recorded submission was on 2025-03-29, 16:15 IST

Select the Language for this assignment.

File name for this program :

import java.sql.*; // Required for JDBC classes
import java.util.*; // Required for Scanner input
 
public class W10_P5 {
    public static void main(String[] args) {
        try {
            Scanner sc = new Scanner(System.in);
 
            // Read input values
            int roll = sc.nextInt();
            sc.nextLine(); // consume newline
            String name = sc.nextLine();
 
            // Set SQLite temp directory to avoid native driver errors in restricted environments
            System.setProperty("org.sqlite.tmpdir", "/tempfs");
 
            // Connect to SQLite database
            Connection conn = DriverManager.getConnection("jdbc:sqlite:/tempfs/db");
 
            // Ensure the 'students' table exists (create it if it doesn't)
            Statement stmt = conn.createStatement();
            String createTableQuery = "CREATE TABLE IF NOT EXISTS students (roll INTEGER, name VARCHAR(30))";
            stmt.executeUpdate(createTableQuery);
 
            // SQL insert statement with placeholders
            String sql = "INSERT INTO students VALUES(?, ?)";
 
            // Prepare the SQL statement
            PreparedStatement pstmt = conn.prepareStatement(sql);
 
            // Set values to the placeholders
            pstmt.setInt(1, roll);     // First '?' is replaced with roll number
            pstmt.setString(2, name);  // Second '?' is replaced with name

// ================================================
            // NOTE TO STUDENTS:
            // Try to solve the task on your own before referring to external help.
            // Avoid using online sources or tools unless absolutely necessary.
            // Engaging with the problem independently will improve your understanding and confidence.
            // ================================================
 
            // TODO: Execute the insert operation using the PreparedStatement
 
            /*
             Hint (only if required):
             - To insert the data into the database, use the executeUpdate() method on the PreparedStatement object.
             - This method executes the SQL command and modifies the database.
 
             Pseudocode:
             pstmt.executeUpdate();
            */
pstmt.executeUpdate();

// If insert is successful, print a confirmation message
            System.out.println("inserted");
 
            // Close resources after use
            pstmt.close();
            conn.close();
            sc.close();
        } catch (Exception e) {
            System.out.println(e);
        }
    }
}

You may submit any number of times before the due date. The final submission will be considered for grading.

Compilation : Passed
Public Test Cases: 1 / 1 Passed

Note: These tests may not be considered while scoring. Know more.

Public Test Cases	Input	Expected Output	Actual Output	Status
Test Case 1	1 Alice	inserted	inserted\n	Passed after ignoring Presentation Error

Swayam Solver

NPTEL Programming In Java Programming Assignment Jan-2025 Swayam

Week 01 : Programming Assignment 1

Week 01 : Programming Assignment 2

Week 01 : Programming Assignment 3

Week 01 : Programming Assignment 4

Week 01 : Programming Assignment 5

Week 02 : Programming Assignment 1

Week 02 : Programming Assignment 2

Week 02 : Programming Assignment 3

Week 02 : Programming Assignment 4

Week 02 : Programming Assignment 5

Week 03 : Programming Assignment 1

Week 03 : Programming Assignment 2

Week 03 : Programming Assignment 3

Week 03 : Programming Assignment 4

Week 03 : Programming Assignment 5

Week 04 : Programming Assignment 1

Week 04 : Programming Assignment 2

Week 04 : Programming Assignment 3

Week 04 : Programming Assignment 4

Week 04 : Programming Assignment 5

Week 05 : Programming Assignment 1

Week 05 : Programming Assignment 2

Week 05 : Programming Assignment 3

Week 05 : Programming Assignment 4

Week 05 : Programming Assignment 5

Week 06 : Programming Assignment 1

Week 06 : Programming Assignment 2

Week 06 : Programming Assignment 3

Week 06 : Programming Assignment 4

Week 06 : Programming Assignment 5

Week 07 : Programming Assignment 1

Implement a Simple Calculator

Week 07 : Programming Assignment 2

Implement a Simple Counter

Week 07 : Programming Assignment 3

Implement a Basic Employee Class

Example Input:Alice 50000

Example Output:Employee: Alice, Salary: 50000

Week 07 : Programming Assignment 4

Implement a Simple Array Processor

You need to complete the implementation of the getMax() method inside the NumberArray class. This method should return the largest number from the array.

Tasks:

Complete the getMax() method in the template section.The method should iterate through the array and find the largest value.

Example Input:

Example Output:Max: 8, Min: 1

Week 07 : Programming Assignment 5

Implement a Simple Password Validator

Input Format:

Output Format:

Example Input:Password123

Example Output:Valid Password

Week 08 : Programming Assignment 1

Week 08 : Programming Assignment 2

Week 08 : Programming Assignment 3

Week 08 : Programming Assignment 4

Week 08 : Programming Assignment 5

Week 09 : Programming Assignment 1

Week 09 : Programming Assignment 2

Week 09 : Programming Assignment 3

Week 09 : Programming Assignment 4

Week 09 : Programming Assignment 5

Week 10 : Programming Assignment 1

Week 10 : Programming Assignment 2

Week 10 : Programming Assignment 3

Week 10 : Programming Assignment 4

Week 10 : Programming Assignment 5

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Example Input:
Alice 50000

Example Output:
Employee: Alice, Salary: 50000

You need to complete the implementation of the `getMax()` method inside the `NumberArray` class. This method should return the largest number from the array.

Complete the `getMax()` method in the template section.
The method should iterate through the array and find the largest value.

Example Output:
Max: 8, Min: 1

Example Input:
Password123

Example Output:
Valid Password