Can a hashset contain duplicates?
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What are the applications of priority queues?
How do you sort an array in descending order?
Mention the advantages of representing stacks using linked lists than arrays?
Can hashmap store null values?
What are the tasks performed during preorder traversal?
What is the complexity of adding an element to the heap?
what is a complexity of linear search,binery search?
Why is selection sort used?
What stack means?
What are linear and non linear data structures?
Which sorting method is slowest?
Is collection a class or interface?