Are duplicates allowed in hashmap?
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Differentiate between failfast and failsafe.
What is data structure what is need of it?
Which is faster hashmap or concurrenthashmap?
Define probing?
Define in brief an array. What are the types of array operations?
What are the Advantages and disadvantages of Array?
Can arraylist contain duplicates?
What is meant by linked list?
What is a string or array type?
What do you mean by priority queue?
What are the major data structures used in the following areas : network data model & hierarchical data model?
what is the biggest advantage of linked lists?