What is difference between set and map?
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What is a hashset?
What is data structure and its classification?
What is binary tree? Explain its uses.
How does selection sort work?
Is it possible to insert different type of elements in a stack? How?
Why we use arraylist instead of linked list?
What is the main advantage of a linked list?
What are the two traversal strategies used in traversing a graph?
Which language is best to learn data structures?
applications of linked lists and mostly used linked list?
What is data structure and data type?
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 ].