What is binary tree and its types?
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What are the advantages and disadvantages of linked list over array?
If we try to add duplicate key to the hashmap, what will happen?
Can a null element added to a treeset or hashset?
What are the standard ways in which a graph can be traversed?
What are all the classes and interfaces that are available in the collections?
When will you use array over arraylist?
Can a tree be empty?
Explain what is binary search?
How many types of linked list are there?
Which algorithm is used in arrays sort?
Explain Queue
Why do we use insertion sort?