What is peek in stack?
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What is complete binary tree in data structure?
What is stack and queue in data structure?
What are the basic operations of stack?
What is inserting in data structure?
What are the major data structures used in the following areas : network data model & hierarchical data model?
Define right-in threaded tree?
How do you solve a selection sort?
Which interfaces are implemented by hashmap?
Why does hashset use hashmap?
What is array define its types?
What happens if we put duplicate key in hashmap?
What is list and types of list?