How to make a Quiz App?

 XML Code

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:background="#FFFFFF"
    tools:context=".MainActivity">

    <TextView
        android:id="@+id/textView"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="32dp"
        android:text="Welcome to Java Quiz"
        android:textColor="#5382A1"
        android:textSize="24sp"
        android:textStyle="bold"
        app:layout_constraintHorizontal_bias="0.497"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/imageView" />

    <ImageView
        android:id="@+id/imageView"
        android:layout_width="89dp"
        android:layout_height="123dp"
        android:layout_marginTop="108dp"
        android:layout_marginEnd="160dp"
        android:layout_marginRight="160dp"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:srcCompat="@drawable/java" />

    <TextView
        android:id="@+id/question"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="32dp"
        android:text="1. Java was introduced in 1823?"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintHorizontal_bias="0.497"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/textView" />

    <Button
        android:id="@+id/yes"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginStart="85dp"
        android:layout_marginLeft="85dp"
        android:text="Yes"
        android:textSize="8sp"
        app:layout_constraintBaseline_toBaselineOf="@+id/no"
        app:layout_constraintStart_toStartOf="parent" />

    <Button
        android:id="@+id/no"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_marginTop="56dp"
        android:layout_marginEnd="84dp"
        android:layout_marginRight="84dp"
        android:text="No"
        android:textSize="8sp"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintTop_toBottomOf="@+id/question" />

</androidx.constraintlayout.widget.ConstraintLayout>

                            Java Code

package com.example.javaquizzz;


import androidx.appcompat.app.AppCompatActivity;

import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
import android.widget.Toast;

public class MainActivity extends AppCompatActivity {
    private String[] questions = {"Java is a person?",
            "Java was introduced in 1233?", "Java was created using Python?",
            "Java has abstract classes?", "Java supports interface?", "Java was created by CodeWithHarry in India?"};
    private boolean[] answers = {false, false, false, true, true, false};
    private int score = 0;
    Button yes;
    Button no;
    TextView question;

    private int index= 0;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        yes = findViewById(R.id.yes);
        no = findViewById(R.id.no);
        question = findViewById(R.id.question);
        question.setText(questions[index]);
        yes.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {

                // If the array is not going out of bounds
                if (index <= questions.length - 1) {
                    // If you have given correct answer
                    if(answers[index]){
                        score++;
                    }
                    // Go to the next question
                    index++;
                    if (index <= questions.length - 1) {
                        question.setText(questions[index]);
                    }
                    else{
                        Toast.makeText(MainActivity.this,
                                "Your score is: " + score + "/" + questions.length,
                                Toast.LENGTH_SHORT).show();
                    }
                }
                else{
                    Toast.makeText(MainActivity.this, "Restart the app to play again", Toast.LENGTH_SHORT).show();
                }
            }


        });
        no.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                // If the array is not going out of bounds
                if (index <= questions.length - 1) {
                    // If you have given correct answer
                    if(!answers[index]){
                        score++;
                    }
                    // Go to the next question
                    index++;
                    if (index <= questions.length - 1) {
                        question.setText(questions[index]);
                    }
                    else{
                        Toast.makeText(MainActivity.this, "Your score is: " + score + "/" + questions.length, Toast.LENGTH_SHORT).show();
                    }
                }
                else{
                    Toast.makeText(MainActivity.this, "Restart the app to play again", Toast.LENGTH_SHORT).show();

                }
            }
        });

    }



}