Why do we need algorithm?
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What should be done in the base case for this recursive problem?
When will you use array over arraylist?
An array having 100 elements have numbers from 1 to 99 randomly out of which any number is repeated. Find the repeated number in minimum time and space complexity.
What do you mean by disjoint set adt?
Suppose in an integer array, there is 1 to 100 number, out of one is duplicate, how to find?
Define binary tree insertion.
What are hashmaps good for?
What is the use of sorting?
Difference between arrays and linked list?
Differentiate between singly and doubly linked lists?
What things you would care about to improve the performance of application if its identified that its db communication that needs to be improved?
How do you do a mergesort?