Difference between hashset and treeset?
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in tree construction which is the suitable efficient data structure? (Array, linked list, stack, queue)
Which sorting algorithm is the slowest?
What are the scenarios in which an element can be inserted into the circular queue?
how to delete first node from singly linked list?
Given M x N matrix with sorted elements row wise and column wise, find elements?
Define non-terminal nodes in a tree?
Explain about the types of linked lists
Which is better arraylist or linkedlist?
What is lifo?
Which is faster hashmap or concurrenthashmap?
Why do we study data structures?
Can nsarray contain nil?