Can hashmap have same key?


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Explain different methods in which you can traverse a tree?

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Now you are given an array of a characters (both ASCII and Kanji) and, an index into the array. The index points to the start of some character. Now you need to write a function to do a backspace (i.e. delete the character before the given index).

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What is the difference between null and void?

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What is data structure and its operations?

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By Which algorithm, the 8 queens problem is solved?

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