What is perfect binary tree?
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how to add an item to the beginning of the list?
What is difference between stack and queue?
In Data Structure, write output of given program.
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Where will be the free node available while inserting a new node in a linked list?
What are different types of sorting algorithms?
Which is faster hashmap or treemap?
Why do we use collections?
What is the difference between collection and collections?
What are scalar values?
How null key is handled in hashmap?
What is integer max_value?
Which language is best for data structures?