What are binary trees?
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Can we put null key in hashmap?
in tree construction which is the suitable efficient data structure? (Array, linked list, stack, queue)
Can we null keys in treemap?
How can avl tree be useful in all the operations as compared to binary search tree?
What is stable sort example?
Can hashset contain duplicates?
What is the complexity of arraylist?
A list is ordered from smaller to largest when a sort is called. Which sort would take the longest time to execute?
What does arrays tostring do?
Which data structures are applied when dealing with a recursive function?
What is the difference between length () and size () of arraylist?
Does arraylist maintain insertion order?