Differentiate between priorityqueue and treeset.
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Why do we use stacks?
Is arraylist synchronized?
Is quicksort greedy algorithm?
Define ancestor and descendant ?
what is Singly Linked list?
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How would you reverse the characters of an array?
What sorting algorithm should be used for sorting strings?
Which sorting is best and why?
How do you increase the capacity of an arraylist?
Is complete binary tree?
Write the algorithm for converting infix expression to postfix expression?