What are red-black trees?
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Differentiate between queue and deque.
How would you reverse characters of an array without using indexing in the array.
What is ds tree?
What is entryset method in map?
Is collection a class or interface?
Is sorting a math skill?
Can treemap key null?
Tell me why can't constant values be used to define an array's initial size
What is the best data structure and algorithm to implement cache?
What is ascii sort order?
Is learning data structures necessary?
What is lifo?