How would you find a duplicate number in a very large unsorted array of ints.
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You have a list of sentences/words. How to find out the sub list that consists of a specific prefix? Ex: input: prefix="he", list = ["hello", "world", "hello world", "hey dude", "galaxy"....] output: ["hello", "hello world", "hey dude"]
Determine the first non-repeated character in a word. For example, in abbcaf it should return c. Do this in O(n) time with O(1) space.
Find the first non-repeating character in a string
Given an array, put all repeated characters together.
Write a program to reverse words in a string
What data structure to use for Smartphone lock screen
A bunch of shapes with patterns, like Tetris and you are required to find the next shape in the puzzle sequence
Write a query to get the required data regarding employees.
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