Define depth and height of a node?
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What is a string array?
Why sorting is used?
Mention a few applications of linked lists?
Differentiate between hashset and treeset.
Can we put null value in hashmap?
Which collection class is thread safe?
What is sequential search?
Is bucket sort a comparison sort?
Differentiate between singly and doubly linked lists?
How is heap sort implemented?
How does a treemap sort?
What is data structure and why we need them?