Which of the collections allows null as the key?
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Why do we need linked list?
What is difference between tree and binary tree?
What is stack and queue in data structure?
What is complexity algorithm?
What is pivot in quicksort?
Define a relation?
What are doubly linked lists?
What is stable sort?
Check if duplicates exist in an array of N which has range 1 to N.
Why do we need searching algorithms?
What will happen if an array goes out of bounds?
Run time memory allocation is known as ?