OCA Java SE 8 Programmer I Certification Guide

6.11. Answers to sample exam questions

Q6-1.

What is the output of the following code?

class Animal {
    void jump() { System.out.println("Animal"); }
}
class Cat extends Animal {
    void jump(int a) { System.out.println("Cat"); }
}
class Rabbit extends Animal {
    void jump() { System.out.println("Rabbit"); }
}
class Circus {
    public static void main(String args[]) {
        Animal cat = new Cat();
        Rabbit rabbit = new Rabbit();
        cat.jump();
        rabbit.jump();
    }
}

1. Animal
   Rabbit

2. Cat
   Rabbit

3. Animal
   Animal

4. None of the above

Answer: a

Explanation: Although the classes Cat and Rabbit seem to override the method jump, the class Cat doesn’t override the method jump() defined in the class Animal. The class Cat defines a method parameter with the method ...