Describe queue operation.
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What is a minimum spanning tree?
What are different sorting algorithms?
Define linked lists?
What do you mean by rehashing?
What is huffman’s algorithm?
What is collections singletonmap?
Why do we need a data structure?
What is difference between for loop and foreach?
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 ].
What do you understand by doubly linked list?
Tell me what should be done in the base case for this recursive problem?
When will you sort an array of pointers to list elements, rather than sorting the elements themselves?