How do you check if a stack is empty or not?
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How do you rotate an AVL tree?
Explain the term base case?
What are sorting algorithms used for?
How does hashset work internally in java?
Which interfaces are implemented by abstractqueue?
Differentiate between hashset and treeset.
Which algorithm is used in arrays sort?
What is the difference between null and void pointer in data structures?
What is the difference between collections class vs collections interface?
What is dynamic array how it is created?
Explain the Queue
What does arraylist remove return?