Which of the collections allows null as the key?
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No. of possible ordered trees with n nodes ? Please give formula (if any).
Differentiate between comparable and comparator.
How to excel in data structures and algorithms?
What are AVL trees?
Define depth and height of a tree?
What is the function of stack?
Explain the uses of binary tree.
Explain the term tail recursion?
What is difference between treeset hashset linkedhashset?
Can hashset contain duplicates?
Which type of efficient data structure is used in the internal storage representation in RDBMS?
Differentiate between list and set.