To use an interface, a class header should include which of the following?
A)The keyword extends and the name of the interface
B)The keyword extends and the name of an abstract method in the interface
C)The keyword implements and the name of an abstract method in the interface
D)The keyword implements and the name of the interface

Question

Quizplus · Accepted Answer

To use an interface, the class header should include the keyword "implements" followed by the name of the interface. Therefore, the correct answer is D. Option A is incorrect as the keyword "extends" is used for inheriting functionality from a superclass, not an interface. Option B is incorrect as it mentions the abstract method in the interface, whereas the class should implement all the abstract methods of the interface. Option C is incorrect as it uses the keyword "implements" along with an abstract method, which is invalid.

To Use an Interface, a Class Header Should Include Which