Which statement is true when a superclass has protected instance variables?
A) A subclass object can assign an invalid value to the superclass's instance variables, thus leaving an object in an inconsistent state.
B) Subclass methods are more likely to be written so that they depend on the superclass's data implementation.
C) We may need to modify all the subclasses of the superclass if the superclass implementation changes.
D) All of the above.

Question

Quizplus · Accepted Answer

A) With protected instance variables, subclass objects have access to those variables and can potentially assign invalid values or modify them in a way that leaves the object in an inconsistent state.
B) Subclasses often rely on the implementation details of the superclass, including its data. This can create tight coupling between the classes, making them more difficult to change independently.
C) If the implementation of the superclass changes, all of its subclasses may need to be modified to account for the change. This can be a maintenance burden and can impact the robustness of the system.

Which Statement Is True When a Superclass Has Protected Instance