Is boolean a data type?
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What is peek in stack?
Is list a data structure?
Why is data structure important?
When new data are to be inserted into a data structure?
What is complete binary tree and almost complete binary tree?
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 ].
When will you use array over arraylist?
Which one is the simplest sorting in data structure?
What is rule regarding overriding equals and hascode method?
Mention a few applications of linked lists?
What is the difference between sorting and classifying?
What is height balanced tree?