Can a hashmap have duplicate keys?
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Explain data structure
What is dynamic data structure?
What are b tree keys?
Define a tree?
Does arraylist shrink?
Why is it important to sort waste?
What sort does arrays sort use?
What are the tasks performed during postorder traversal?
What are the tasks performed during preorder traversal?
Is array a collection?
Explain what are the methods available in storing sequential files ?
What is rule regarding overriding equals and hascode method?