Explain the Complete structure of hashmap along with the basic coding of the hashmap internal implementation.
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List the data structures which are used in hierarchical data model.
What is the easiest sorting method to use in data structures?
Differentiate between comparable and comparator.
Explain what are the notations used in evaluation of arithmetic expressions using prefix and postfix forms?
What are the applications of linked list?
What are red-black trees?
How remove all from arraylist?
Is priority queue sorted?
What is lifo?
How does max heap work?
Which algorithm is used in collections sort method?
Evaluate the following prefix expression " ++ 26 + - 1324" (Similar types can be asked)