What is method overloading?

Given : 

class A {

    A() {

        display();

    }

    void display() {

        System.out.println("A");

    }

}

class B extends A {

    int value = 10;

    void display() {

        System.out.println(value);

    }

}

What will be printed when this is executed?

public class Test {

    public static void main(String[] args) {

        A obj = new B();

    }

}

In a Java EE application, what is the main purpose of a cookie?

Polymorphism applies for both static or non-static methods of a class

What is the output of the following code:

import java.util.*;

class User {

    String name;

    User(String name) {

        this.name = name;

    }

    @Override

    public boolean equals(Object o) {

        if (this == o) return true;

        if (!(o instanceof User)) return false;

        User user = (User) o;

        return Objects.equals(name, user.name);

    }

}

public class Test {

    public static void main(String[] args) {

        Set<User> users = new HashSet<>();

        users.add(new User("Alice"));

        users.add(new User("Alice"));

        System.out.println(users.size());

    }

}

A class can be declared as public, private or package private.

Which of the following statements is true about checked exceptions?