What is the difference between for and foreach loop?
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What things you would care about to improve the performance of application if its identified that its db communication that needs to be improved?
Can hashmap store null values?
How will you free the memory that is allocated at run time?
How does bogo sort work?
What is stable sorting method?
What are lists?
How many different binary trees and binary search trees can be made from three nodes that contain the key values 1, 2 & 3?
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What are common data structures?
Can we put null value in hashmap?
Which is faster array or linked list?
how to search an element in sorted linked list with time complexity is O(log n).
If I try to add enum constants to a treeset, what sorting order will it use?