Does hashmap preserve insertion order?
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Define terminal nodes in a tree?
Is hashtable better than dictionary?
What is the difference between arraylist and array?
Can hashset contain null?
What is difference between linear and non linear data structure?
What is the need for priority queue?
What is map keyset?
For searches. Which one is most preferred: array list or linked list?
What is the data structures used to perform recursion?
Explain the implementation of an AVL tree and Binary tree.
Are hash tables ordered?
Define graph?