Which of the following statements about abstract base classes is true
A) abstract base classes may contain data.
B) abstract base classes may not contain implementations of methods.
C) abstract base classes must declare all methods as abstract.
D) abstract base classes must declare all data members not given values as abstract.

Question

Quizplus · Accepted Answer

Abstract base classes can contain data, including variables that can be inherited and used by subclasses. They can also contain implementations of methods, not all methods have to be abstract, and there's no requirement for data members to be declared as abstract.

Which of the Following Statements About Abstract Base Classes Is