SCJP (Sun Certified Programmer for the Java 2 Platform) tutorials

 Which statements about static inner classes are true? (Choose Two)

A. A static inner class requires a static initializer.
B. A static inner class requires an instance of the enclosing class.
C. A static inner class has no reference to an instance of the enclosing class.
D. A static inner class has access to the non-static members of the outer class.
E. Static members of a static inner class can be referenced using the class name of the static inner class.

Which interface does java.util.Hashable implement?

A. Java.util.Map.
B. Java.util.List.
C. Java.util.Hashable.
D. Java.util.Collection.