Define parent node?
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Which is better selection or bubble sort?
In what areas do data structures applied?
What is data structure and why we need it?
What is queue in data structure?
Which is faster array or linked list?
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 ].
Why use a tuple instead of a list?
How to copy an array into another array?
Define a set?
What is the difference between hashmap and linkedhashmap?
What is difference between data type and variable?
applications of stacks and their uses?