Question program

 import java.lang.*;

import java.io.*;

class Questions {

    public String[][] qpa;

    public String[][] qca;

    Questions() throws IOException {

        qpa = new String[10][5];

        // Updated questions and objectives

        DataInputStream in = new DataInputStream(System.in);

        qpa[0][0] = "What is the default value of an int variable in Java?";

        qpa[0][1] = "1. 0.0";

        qpa[0][2] = "2. null";

        qpa[0][3] = "3. 0";

        qpa[0][4] = "4. Undefined";

        qpa[1][0] = "Which of these is a loop construct that will always execute at least once?";

        qpa[1][1] = "1. for";

        qpa[1][2] = "2. while";

        qpa[1][3] = "3. do-while";

        qpa[1][4] = "4. foreach";

        qpa[2][0] = "Which of the following is not a Java feature?";

        qpa[2][1] = "1. Object-oriented";

        qpa[2][2] = "2. Use of pointers";

        qpa[2][3] = "3. Platform independent";

        qpa[2][4] = "4. Dynamic";

        qpa[3][0] = "Which keyword is used to define a subclass in Java?";

        qpa[3][1] = "1. super";

        qpa[3][2] = "2. this";

        qpa[3][3] = "3. extends";

        qpa[3][4] = "4. implements";

        qca = new String[10][2];

        // Updated correct answers

        qca[0][0] = "What is the default value of an int variable in Java?";

        qca[0][1] = "3. 0";

        qca[1][0] = "Which of these is a loop construct that will always execute at least once?";

        qca[1][1] = "3. do-while";

        qca[2][0] = "Which of the following is not a Java feature?";

        qca[2][1] = "2. Use of pointers";

        qca[3][0] = "Which keyword is used to define a subclass in Java?";

        qca[3][1] = "3. extends";

    }

}

public class qu {

    public static void main(String[] args) throws IOException {

        DataInputStream in = new DataInputStream(System.in);

        int x, correct = 0, wrong = 0, i, j;

        String ans[] = new String[10];

        Questions q = new Questions();

        System.out.println("JAVA QUIZ");

        System.out.println();

        // Loop to display questions and read the answer from the user

        for (i = 0; i < 4; i++) {

            for (j = 0; j < 5; j++) {

                System.out.println(q.qpa[i][j]);

            }

            System.out.println("your answer:");

            x = Integer.parseInt(in.readLine());

            ans[i] = q.qpa[i][x];

        }

        // Calculate correct answers

        for (i = 0; i < 4; i++) {

            if (q.qca[i][1].equals(ans[i])) correct++;

            else wrong++;

        }

        // Printing the correct answers and user-selected answers

        System.out.println("CORRECT ANSWERS");

        for (i = 0; i < 4; i++) {

            System.out.println();

            System.out.println(q.qpa[i][0]);

            System.out.println("correct answer: " + q.qca[i][1]);

            System.out.println("your answer: " + ans[i]);

        }

        System.out.println("Correct = " + correct + "\twrong = " + wrong);

    }

}