What is a list of lists?
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What are the tasks performed during preorder traversal?
Can we store a string and integer together in an array?
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 is list and its types?
Explain how is linked list implemented?
Define a set?
Is array a collection?
Give the example of validating the parenthesis of expression using stack.
Can sets contain duplicates?
What are the advantages of linked list over an array?
Which is the simplest file structure? (a) Sequential (b) Indexed (c) Random (a) Sequential
Is treeset thread safe?