Which of the following statements about a class is correct?
A) A class should not have private instance variables.
B) Private instance variables are the interface to the class.
C) Private instance variables hide the implementation of a class from the class user.
D) Private instance variables should rarely be used in classes.

Question

Quizplus · Accepted Answer

Private instance variables are used to hide the implementation details of a class from the user, allowing for greater flexibility in changing the internals of the class without affecting the external API. Therefore, statement C is correct. A is incorrect because private instance variables are a common way to enforce encapsulation. B is incorrect because private instance variables are not part of the external interface of a class. D is incorrect because private instance variables can be very useful in certain situations to ensure data integrity and encapsulation.

Which of the Following Statements About a Class Is Correct