inheritance quiz

Which keyword is used to inherit a class in Java?

• implement

• extends

• inherits

• derive

What type of relationship does inheritance represent in OOP?

• Has-a

• Uses-a

• Is-a

• Owns-a

class Animal {

void sound() {

System.out.println("Animal makes sound");

}

}

class Dog extends Animal {

void sound() {

System.out.println("Dog barks");

}

public static void main(String[] args) {

Dog d = new Dog();

d.sound();

}

}

• Animal makes sound

• Dog barks

• Compilation error

• Runtime error

Which of the following is not true about inheritance in Java?

• A subclass inherits all members of the superclass

• Private members of the superclass are accessible in the subclass

• Constructors are not inherited

• A subclass can override non-final methods of the superclass

Which of the following inheritance types does Java support directly?

• Multilevel inheritance

• Multiple inheritance using classes

• Hybrid inheritance

• Multipath inheritance