Can we use any class as map key?
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What is a bubble sort and how do you perform it?
Why is hashing used?
Which is better merge or quick sort?
What is non linear data structure with example?
What is the maximum total number of nodes in a tree that has N levels? Note that the root is level (zero)
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Explain the difference between hashset and hashmap?
Define linked list data structure.
Can arraylist have duplicates?
Can an arraylist be null?
Is Arraylist faster than Array? Why?
What is ds heap sort?
What is application of data structure?