What can be said about the following code Mike Wolf My OCA Mock Quest

Question 83 / 90: What can be said about the following code?

public interface Audible {...}
public class Stereo implements Audible {...}
public class Computer implements Audible {...}

public class AudioSource() {
  public void startPlaying(Audible sound) {...}
}

A Audible is the base class for the Stereo and Computer classes.

B The startPlaying code should be changed so it uses polymorphism.

C Object is not a base class for the AudioSource class.

D The startPlaying method is using the design principle of “programming to an interface.”

<< First < Previous Next > Last >>

Explanation:

D. This is an example of programming to an interface.

The startPlaying method will except as an argument any object that implements that Audible interface.

A, B, and C are incorrect.

A is incorrect because Audible is an interface, not a class.

B is incorrect because this example is already using polymorphism.

C is incorrect because Object is the implied base class for all objects.

Exam Home Page

https://www.jobilize.com/quiz-my-oca-mock-exam-by-mike-wolf

My OCA Mock

Author:

Mike Wolf

Access: Public Instant Grading

Ask

	9 Domain Driven Design By JavaChamp Team Start Quiz
	10 AP 10 Muscle Tissue MCQ Quiz By OpenStax Start Quiz
©flickr: Gareth	Professional Etiquette MCQ By Abby Sharp Start Quiz
	Interventionism Mixed Economy By Robert Murphy Start Test
©flickr: Luis	Chemistry Final Review By Madison Christian Start Exam
©flickr:	Arctic Ease Telemarketing Campaign Quiz By Nicole Duquette Start Quiz
	6 Psychology MCQ 2010 2 Exam By John Gabrieli Start Exam
	Understanding basic music theory By OpenStax Read Online Course
	4 Pharmacology Essay Excl. Nervous System By Rohini Ajay Start Test
	21 Kidney/Liver Biopath By Brooke Delaney Start Exam

Copy and paste the following HTML code into your website or blog.