Java Inheritance

Which keyword is used in Java to establish an inheritance relationship between two classes?

In the context of Java inheritance, what term is used to refer to the class that is being inherited from?

What is the primary benefit of using inheritance in Java?

Which type of inheritance is NOT directly supported in Java for classes, but can be achieved through interfaces?

In Java, what is the purpose of the super keyword?

Consider a scenario where class B extends class A, and class C extends class B. What type of inheritance does this represent?

Which of the following best describes hierarchical inheritance in Java?

What is the output of the following Java code?

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

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

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

What is the output of the following Java code snippet?

class A {
    void methodA() { System.out.println("A"); }
}

class B extends A {
    void methodA() { System.out.println("B"); }
    void methodB() { System.out.println("B"); }
}

public class Main {
    public static void main(String[] args) {
        A obj = new B();
        obj.methodA();
    }
}

What is the output of the following Java code?

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

class Child extends Parent {
    void display() {
        super.display();
        System.out.println("Child display");
    }
}

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

Consider the classes Animal, Mammal, and Dog where Mammal extends Animal and Dog extends Mammal. If the Animal class has a protected method makeSound(), which classes can directly access makeSound()?

A class Vehicle has a method startEngine(). A class Car extends Vehicle and overrides the startEngine() method to include additional car-specific steps. How can Car's startEngine() method call the original startEngine() method defined in Vehicle?

Class X has a private field value. Class Y extends X. Can class Y directly access or modify the value field?

Given a class Animal with a protected method eat(), and a class Dog extending Animal in a different package, which of the following is true?

Consider two classes, Parent and Child, where Child extends Parent. Both classes have a method named calculate. If you create an instance of Child and call calculate, which version of the method is executed? Assume calculate is not overridden in Child.

Which of the following is a valid example of single inheritance in Java?

If a subclass defines a method with the same signature (name and parameters) as a method in its superclass, what is this process called?

In a class hierarchy, if a superclass method throws a checked exception, what must the overriding method in the subclass do?

Which of the following statements is true regarding constructors and inheritance in Java?

Consider the following code:

class Vehicle {
    public String modelName = "Generic Vehicle";
}

class Car extends Vehicle {
    private String modelName = "Specific Car";

    public void printModelName() {
        System.out.println(modelName);
        System.out.println(super.modelName);
    }

    public static void main(String[] args) {
        Car myCar = new Car();
        myCar.printModelName();
    }
}

What will be the output when the main method is executed?