When you create a class and use the implements clause to implement an interface but fail to code one of the interface's methods, the compiler error generated indicates that you must declare your class to be ____.
A) abstract
B) static
C) public
D) new

Question

When you create a class and use the implements clause to implement an interface but fail to code one of the interface's methods, the compiler error generated indicates that you must declare your class to be ____.
A) abstract
B) static
C) public
D)   new

Quizplus · Accepted Answer

When you implement an interface, you must implement all of the methods declared in that interface. If you fail to do so, the class must be declared as abstract. This is because any concrete class that extends the abstract class will be required to implement the unimplemented methods, either directly or through another level of inheritance. Declaring the class as abstract will prevent the compiler errors and allow for the class to be extended later with the missing methods being implemented.

When You Create a Class and Use the Implements Clause