Can we add duplicate keys in a hashmap?


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What are the scenarios in which an element can be inserted into the circular queue?

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How many different binary trees and binary search trees can be made from three nodes that contain the key values 1, 2 & 3?

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Which is better stack or queue?

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Why do we use sorting?

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Can constructor be static?

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Is map a data structure?

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Which one is faster? A binary search of an orderd set of elements in an array or a sequential search of the elements.

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Is quicksort faster than merge sort?

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Explain what is binary search?

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