What is a collection in iOS?

what is load factor in java collections?

What is an Iterator?

What is the default size of load factor in hashing based collection?

What is the Dictionary class?

What is hash-collision in Hashtable and how it is handled in Java?

What is the advantage of generic collection?

How to synchronize List, Set and Map elements?

Why we override equals() method?

What does the hashCode() method?