Define indegree of a graph?
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What is perfect binary tree?
List the data structures which are used in network data modal.
Define the term “percolate up”?
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 ].
Are duplicates allowed in list?
What is complete binary tree and almost complete binary tree?
Why is concurrenthashmap thread safe?
How does selection sort work?
What is data and its type?
What is the difference between array list and vector list?
Describe the merge sort principle and what will be its time complexity?
Does treeset remove duplicates?