Collections interview questions

why collectoion is introduced into the market?
how to sort elements in alphabetical order?
what is the difference between collection and collectons?
different concepts of collections?
what is the difference between set and list?
what is the difference between list set and map?
what is the difference between hashset and linlkedlist?
what are the types of iterators presrent in the collections?
difference between linkedlist and hashmap?
what is queue?
waht is the difference between treeset and linked hashset?
what is difference betwen treemap and hashmap?
what is the differnce between vector and arraylist?
difference between iterator and listiterator?
what is sortedset and tailset and headset?

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