Some sample Java programming test questions and answers:

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 1. Write a Java program to check if a number is even or odd.
solution:

import java.util.Scanner;


public class Main {

    public static void main(String[] args) {

        Scanner input = new Scanner(System.in);

        System.out.print("Enter a number: ");

        int num = input.nextInt();

        if (num % 2 == 0) {

            System.out.println(num + " is even.");

        } else {

            System.out.println(num + " is odd.");

        }

    }

}

2. Write a Java program to find the largest among three numbers.
solution:

import java.util.Scanner;


public class Main {

    public static void main(String[] args) {

        Scanner input = new Scanner(System.in);

        System.out.print("Enter three numbers: ");

        int num1 = input.nextInt();

        int num2 = input.nextInt();

        int num3 = input.nextInt();

        int largest = num1;

        if (num2 > largest) {

            largest = num2;

        }

        if (num3 > largest) {

            largest = num3;

        }

        System.out.println("The largest number is " + largest);

    }

}


3. Write a Java program to reverse a string.

solution:


import java.util.Scanner;


public class Main {

    public static void main(String[] args) {

        Scanner input = new Scanner(System.in);

        System.out.print("Enter a string: ");

        String str = input.nextLine();

        String reversed = "";

        for (int i = str.length() - 1; i >= 0; i--) {

            reversed += str.charAt(i);

        }

        System.out.println("The reversed string is " + reversed);

    }

}


4. Write a Java program to find the factorial of a number.
solution:


import java.util.Scanner;


public class Main {

    public static void main(String[] args) {

        Scanner input = new Scanner(System.in);

        System.out.print("Enter a number: ");

        int num = input.nextInt();

        int factorial = 1;

        for (int i = 1; i <= num; i++) {

            factorial *= i;

        }

        System.out.println("The factorial of " + num + " is " + factorial);

    }

}

                                

5. Write a Java program to check if a string is a palindrome.
solution:


import java.util.Scanner;


public class Main {

    public static void main(String[] args) {

        Scanner input = new Scanner(System.in);

        System.out.print("Enter a string: ");

        String str = input.nextLine();

        boolean isPalindrome = true;

        for (int i = 0; i < str.length() / 2; i++) {

            if (str.charAt(i) != str.charAt(str.length() - 1 - i)) {

                isPalindrome = false;

                break;

            }

        }

        if (isPalindrome) {

            System.out.println(str + " is a palindrome.");

        } else {

            System.out.println(str + " is not a palindrome.");

        }

    }

}


I hope this helps! 😊

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