in JavaCaps mock
test (Title-10):
http://www.javacaps.com/scjp_util.html question #2.Which of the following allows duplicates , and introduces positional indexing.?
[a] Set
[b] Map
[c] Iterator
[d] List
To my surprise, the answer is b?!
As I remember, Map doesnot allow duplicates in the collection, right?
who can help me to clear this?? Many thanks in advance!