What is the difference between collection and collections?
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What is the time complexity of hashmap get () and put () method?
Tell me why might quick sort might be better than merge sort?
What's difference between stack and queue?
Why are b trees used?
What is sorting and classifying?
Explain what is linear search?
What are hashmaps good for?
How do you use merge sort?
Define primary data structures?
What is a multidimensional array?
What does it mean to sort an array?
Why using cookie to store session info is a better idea than just using session info in the request?