What is binary tree and its types?
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Differentiate between queue and stack.
Does arraylist contain duplicates?
What are two types of sorting?
How many types of lists are there?
How many sorting algorithms are there?
What are the different types of sorting in data structure?
Can arraylist be null?
What do you mean by balance factor of a node in avl tree?
Why do we use sorting?
Construct a doubly linked list using a single pointer in each node?
Difference between arraylist and linkedlist?
Can a hashmap have duplicate keys?