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30 questions

  1. 1Top k frequent elementsMediumCoding· Amazon, Apple
  2. 23Sum ClosestMediumCoding· Apple, Kotak
  3. 3Group anagramsMediumCoding· Blinkit, MakeMyTrip
  4. 4Minimum Height TreesMediumCoding· Apple, UrbanCompany
  5. 5Product of Array Except SelfMediumCoding· PayPal, Target
  6. 6Course ScheduleMediumCoding· Zoho
  7. 7Given the root of a binary tree of integers, return the maximum path sum.MediumCoding· Adobe, Apple
  8. 8Print all combinations of numbers from 1 to n that sum to n.MediumCoding· Adobe, Apple
  9. 9Find the container with the maximum volume of water.MediumCoding· Apple, Goldman Sachs
  10. 10Design an indexer and a retrieverMediumCoding· Apple
  11. 11Explain the differences between stack and heap memory allocation.MediumCoding· Apple, Microsoft
  12. 12Given an array with objects colored red, white, or blue, sort them so those of the same color are adjacent. Use integers 0, 1, 2 to represent RWB respectively.MediumCoding· Apple
  13. 13Given 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
  14. 14Implement TrieMediumCoding· Apple, Goldman Sachs
  15. 15PermutationsMediumCoding· Adobe, Apple
  16. 16Find the longest palindromic subsequence using dynamic programming.MediumCoding· Adobe, Apple
  17. 17Find the longest substring without repeating characters.MediumCoding· Apple, Intuit
  18. 18Find the lowest common ancestor (LCA) of two nodes in a binary tree.MediumCoding· Apple, LinkedIn
  19. 19Maximum Number of Visible PointsMediumCoding· Apple
  20. 20Find the maximum subarray sum.MediumCoding· Adobe, Apple
  21. 21Partition an array into two sub-arrays with equal sum.MediumCoding· Apple, LinkedIn
  22. 22Given stock prices for the next n days, how can you maximize your profit by buying or selling one share per day?MediumCoding· Adobe, Apple
  23. 23Build a CalculatorMediumCoding· Adobe, Apple
  24. 24Determine if an array of integers from 1 to n contains a duplicate in constant time and space.MediumCoding· Adobe, Apple