Exam 1z0-808 topic 1 question 222 discussion

Correct answer is: C The answer lies on the surface - you just have to be careful. An abstract class method must either be abstract or have an implementation! In this case, we need to fix the syntax error - make the method abstract.

Answer is C.

Tested, answer is C. To test: abstract class Robot implements Speakable { public void process(); // replace public void process(); with public abstract void process(); } class Humanoid extends Robot { public void speak(String s) { System.out.println(s); } public void process() { System.out.println("Helping... "); } } interface Speakable { public void speak(String s); } public class Test { public static void main(String[] args) { Robot r = new Humanoid(); r.process(); r.speak("Done"); } }

The correct answer is letter C, you can answer by elimination: A -> The humanoid class already overloads the 2 methods of its super class and the interface that implements its superclass, it wouldn't change anything to put abstract in the class definition B -> I wouldn't change anything either, even switching to an abstract class, its methods are overloaded D -> This is the most wrong one, a class cannot extend an interface, classes implement interfaces, the only type of object that can extend interfaces are the interfaces themselves.