Interfaces can be used to derive other interfaces. The child interface contains all ____________ of the parent.
A) Non-abstract methods
B) Abstract methods
C) Parameters
D) None of the above

Question

Quizplus · Accepted Answer

Interfaces in Java can extend other interfaces, and when they do, the child interface inherits all the abstract methods from the parent interface. Interfaces only contain abstract methods (prior to Java 8, after which they can also contain default and static methods), but the statement specifically refers to what is inherited, which are the abstract methods.

Interfaces Can Be Used to Derive Other Interfaces