Two linked lists are given, find out the sum of them without altering the linked list?
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an array of size N in which every number is between 1 and N, determine if there are any duplicates in it. You are allowed to destroy the array if you like. [ I ended up giving about 4 or 5 different solutions for this, each supposedly better than the others ].
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In which data structure, elements can be added or removed at either end, but not in the middle?
42 Answers Infosys, NIC, TTA, Wipro,
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