What is the most used data structure?
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Explain the uses of binary tree.
Is hashmap faster than arraylist?
When new data are to be inserted into a data structure?
What is worst case complexity algorithm?
How do you find the size of an arraylist?
Define a complete binary tree?
What does args stand for?
Give the example of validating the parenthesis of expression using stack.
Are duplicates allowed in hashmap?
Is Arraylist faster than Array? Why?
Which type of sorting is best?
Which collection is fail safe?