Q37. What is the Vector class?
The Vector class provides the capability to implement a growable array of objects

Q38. What modifiers may be used with an inner class that is a member of an outer class?
A (non-local) inner class may be declared as public, protected, private, static, final, or abstract.

Q39. What is an Iterator interface?
The Iterator interface is used to step through the elements of a Collection.

Q40. What is the difference between the >> and >>> operators?
The >> operator carries the sign bit when shifting right. The >>> zero-fills bits that have been shifted out.