Java Encapsulation MCQs

public class Student {
    private int rollNumber;
    public String name;

    public Student(int rollNumber, String name) {
        this.rollNumber = rollNumber;
        this.name = name;
    }

    public int getRollNumber() {
        return rollNumber;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }
}

public class Main {
    public static void main(String[] args) {
        Student student = new Student(101, "Alice");
        System.out.println(student.getName() + " has roll number " + student.getRollNumber());
    }
}

class BankAccount {
    private double balance;

    public BankAccount(double initialBalance) {
        balance = initialBalance;
    }

    protected void deposit(double amount) {
        balance += amount;
    }
}

public class Main {
    public static void main(String[] args) {
        BankAccount account = new BankAccount(1000);
        account.deposit(500);
        System.out.println("Balance: " + account.balance);
    }
}

package com.example;

public class MyClass {
    int x = 5;
    private int y = 10;
}

class Main {
    public static void main(String[] args) {
        MyClass obj = new MyClass();
        System.out.println(obj.x + obj.y);
    }
}

class Parent {
    private void display() {
        System.out.println("Parent display");
    }
}

class Child extends Parent {
    public void show() {
        System.out.println("Child show");
    }
}

class Main {
    public static void main(String[] args) {
        Parent parent = new Child();
        parent.display();
    }
}

class MyClass {
    protected int x = 5;
}

class Main {
    public static void main(String[] args) {
        MyClass obj = new MyClass();
        System.out.println(obj.x);
    }
}

class MyProgram {
    public static void main(String[] args) {
        System.out.println("Hello, world!");
    }
}

import java.util.*;

public class Main {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        System.out.println("Enter a number: ");
        int number = scanner.nextInt();
        System.out.println("You entered: " + number);
    }
}

public class MyProgram {
    public static void main(String[] args) {
        int x = 10;
        int y = 20;
        int sum = x + y;
        System.out.println("Sum: " + sum)
    }
}

import java.util.*;

public class Main {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        System.out.print("Enter your name: ");
        String name = scanner.nextLine();
        System.out.println("Hello, " + name);
    }
}

public class Main {
    public static void main(String[] args) {
        int numbers[] = {1, 2, 3, 4, 5};
        for (int i = 0; i <= numbers.length; i++) {
            System.out.print(numbers[i] + " ");
        }
    }
}

class MyProgram {
    public static void main(String[] args) {
        int x = 10;
        double y = 20.5;
        char ch = "A";
        System.out.println(x + y + ch);
    }
}

import java.util.*;

public class Main {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        System.out.print("Enter your age: ");
        int age = scanner.next();
        System.out.println("Your age is: " + age);
    }
}

import java.util.*;

public class Main {
    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        System.out.print("Enter your name: ");
        String name = scanner.next();
        System.out.println("Hello, " + name);
    }
}

class MyClass {
    public void display() {
        System.out.println("Hello, world!");
    }
}

public class Main {
    public static void main(String[] args) {
        MyClass obj = new MyClass();
        obj.display();
    }
}

class Parent {
    private int x;
}

class Child extends Parent {
    public void display() {
        System.out.println("Value of x: " + x);
    }
}

public class Main {
    public static void main(String[] args) {
        Child child = new Child();
        child.display();
    }
}