What do you mean by hash table?
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Explain the most efficient method to reverse a linked list?
Differentiate between hashmap and treemap.
What is the minimum number of queues needed when implementing a priority queue?
Which sorting algorithm uses minimum number of swaps?
What are the drawbacks of array implementation of queue?
Explain what are the major data structures used in the rdbms?
Which process places data at the back of the queue?
What is a bubble sort and how do you perform it?
What is Insertion sort, selection sort, bubble sort( basic differences among the functionality of the three sorts and not the exact algorithms)?
Why you need a data structure?
What is the default value of Array?
Can arraylist be null?