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Does hashmap allow null keys?


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More Data Structures Interview Questions

Explain what are the notations used in evaluation of arithmetic expressions using prefix and postfix forms?

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What is space complexity of a program?

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Why merge sort is better than insertion sort?

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Which data structures are used in bfs and dfs algorithm?

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Which is faster list or set?

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Why do we need arrays if all the operations that are performed on arrays can be performed on arraylist?

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Convert the following infix expression to post fix notation ((a+2)*(b+4)) -1

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How do you do binary search?

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State the advantages of using postfix notations?

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Name few collections map implementations?

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Which interfaces are implemented by abstractqueue?

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What is the difference between hashset and treeset?

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