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21 questions

  1. 1Climbing StairsEasyCoding· Media.net
  2. 2Koko eating bananas.MediumCoding· Flipkart, Amazon
  3. 3Group anagramsMediumCoding· Blinkit, MakeMyTrip
  4. 4Linked List CycleEasyCoding· CCognitree
  5. 5Given the root of a binary tree of integers, return the maximum path sum.MediumCoding· Adobe, Apple
  6. 6Find the container with the maximum volume of water.MediumCoding· Apple, Goldman Sachs
  7. 7Implement a hashmap without using any libraries.HardCoding· Apple, Goldman Sachs
  8. 8Find a triplet in an array with a given sum.MediumCoding· Adobe, Goldman Sachs
  9. 9Given n houses in a line with money in each, find the maximum amount a robber can steal, without stealing from two adjacent houses.MediumCoding· Adobe, Apple
  10. 10Implement TrieMediumCoding· Apple, Goldman Sachs
  11. 11Find the longest palindromic subsequence using dynamic programming.MediumCoding· Adobe, Apple
  12. 12Implement LRU Cache.HardCoding· Accenture, Adobe
  13. 13Given an integer array nums and an integer k, return true if nums has a subarray of at least two elements whose sum is a multiple of k.HardCoding· Adobe, Apple
  14. 14Calculate the trapped rainwater between bars in a given array.HardCoding· Adobe, Amazon
  15. 15Find Largest NumbersMediumCoding· Accenture, Goldman Sachs
  16. 16Given an array, find the two sum.EasyCoding· Adobe, Amazon
  17. 17Given an array of n integers and a number k, find the maximum number of elements whose sum is less than k, and return their sum.MediumCoding· Goldman Sachs
  18. 18Implement a queue using stacks.MediumCoding· Goldman Sachs
  19. 19Given the row and column, return the value at that position in Pascal's triangle.MediumCoding· Goldman Sachs
  20. 20Valid ParenthesesEasyCoding· Apple, Booking.com
  21. 21Is this a valid palindrome?EasyCoding· Adobe, Apple