An abstract class
A)has at least one method that is identified but not defined.
B) is defined in each class in which it appears.
C)has no constructor method.
D)has at least one data member that is not referenced during processing.

Question

Quizplus · Accepted Answer

An abstract class is a class that cannot be instantiated on its own and has at least one method that is identified but not defined, which is known as an abstract method. This method must be implemented in any class that inherits from the abstract class. Option B is incorrect because an abstract class is defined only once and is inherited by other classes. Option C is also incorrect because an abstract class can have a constructor method. Finally, option D is incorrect because all data members in an abstract class should be referenced during processing.

An Abstract Class