A class that has no direct instances, but whose descendants may have direct instances best defines:
A) concrete class.
B) abstract class.
C) super class.
D) incomplete class.
E) simple class.

Question

Quizplus · Accepted Answer

An abstract class is a class that cannot be directly instantiated, but serves as a base for other classes that can be instantiated. It contains abstract methods that must be implemented by its subclasses. Therefore, an abstract class has no direct instances, but its descendants may have direct instances. A concrete class, on the other hand, can be directly instantiated. A super class is a class that is inherited by other classes, but it can be either abstract or concrete. An incomplete class and a simple class are not recognized terms in object-oriented programming.

A Class That Has No Direct Instances, but Whose Descendants