Differentiate null and void?
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What are the scenarios in which an element can be inserted into the circular queue?
What are the parts of root node?
How would you sort a linked list?
Which is better hashmap or treemap?
Write a recursive c function to calculate the height of a binary tree.
Is arraylist fail fast?
Is hashmap an object?
Does hashmap preserve insertion order?
What is difference between list and linked list?
How null key is handled in hashmap?
What is a hashmap in c?
Tell me about the different sorting techniques.