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What is the difference between hashset and hashmap?


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More Data Structures Interview Questions

What is a bubble sort and how do you perform it?

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Define depth and height of a node?

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Why enum can not be used directly with printf function?

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I am given a sequential algorithm that does a routine search on an unordered list. N = 20. The probability that the value x does NOT appear in the list is exactly 60%, and the probability that x DOES appear is 40%. The 3 questions that I could not get were: A) What is the avg number of element comparisons performed when n = 20 and x does NOT appear in the List. (my answer was 20, is this correct?) B) What is the avg number of element comparisons peformed when n = 20 and x DOES appear in the list? C) What is the avg number of element comparisons performed when n = 20. This should be a single number answer they said.

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Is hashset thread safe?

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Explain the uses of binary tree.

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What is a stable sorting algorithm?

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What are the Differences between map and hashmap?

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What is the difference between collections class vs collections interface?

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Explain the uses of matrix with an example?

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What is binary tree used for?

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