Which two statements are true?
A.
An abstract class CANNOT be extended by an abstract class.
B.
An abstract class can be extended by a concrete class.
C.
An interface can be extended by an abstract class.
D.
An interface CANNOT be extended by another interface.
E.
An abstract class can implement an interface.
F.
An abstract class can be extended by an interface.
BE
BE
http://docs.oracle.com/javase/tutorial/java/IandI/abstract.html
Answer: B, E
Explanation:
Abstract class ca be extended by another abstract class.
Interface can be implemented by abstract class not extended.
Interface can be extended by another interface.
Abstract class can’t be extended by interface.