A class that implements an interface but only gives definitions for some of the method headings given in the interface is called a/an:
A)concrete class
B)abstract class
C)discrete class
D)friendly class

Question

Quizplus · Accepted Answer

A class that implements an interface but only gives definitions for some of the method headings given in the interface is called an abstract class. An interface has a set of method headings, but it doesn't have any implementation. When a class implements an interface, it is required to define all of the method headings specified in the interface. However, an abstract class that implements an interface doesn't have to define all of the methods in the interface but can leave some of them abstract.

A Class That Implements an Interface but Only Gives Definitions