Question bank

4,310 interview questions, answered.

Reference answers, what the interviewer is really testing, how it is graded, and the follow-ups that come next.

Easy 190Medium 2,498Hard 982
Filters · onDifficulty, topic, company
Clear all

1,063 questions

  1. 745Two pointerCoding· Amazon
  2. 746Two-Pointer approachCoding· Cisco
  3. 747Two-Pointer BasedCoding· AAugnito, Cisco Meraki
  4. 748Two-Pointer ProblemCoding· Wayfair
  5. 749Ugly NumberEasyCoding· Amazon
  6. 750Ugly Number IIIMediumCoding· Media.net
  7. 751Unique SubstringsCoding· Goldman Sachs
  8. 752Valid AnagramCoding· Adobe
  9. 753Valid Binary Search TreeCoding· HubSpot
  10. 754Valid SudokuMediumCoding· PayPal
  11. 755Valid Triangle NumberCoding· Zoho
  12. 756Validate Parentheses String with WildcardsCoding· VVegapay
  13. 757Verbal Arithmetic PuzzleHardCoding· Wells Fargo
  14. 758Wildcard matchingCoding· Amazon
  15. 759Word FrequencyMediumCoding· NetApp
  16. 760Zig-Zag level order traversalCoding· SASigmoid Analytics
  17. 761Zigzag ConversionCoding· PayPal
  18. 762Zigzag Level Order TraversalCoding· Ather Energy, Zoho
  19. 763Course ScheduleMediumCoding· Zoho
  20. 764Validate IP AddressMediumCoding· Salesforce
  21. 76501 Matrix: find the nearest zero for every cellMediumCoding· Adobe, Oracle
  22. 766Given a list of car rental requests with start and end times, assign cars to rentals such that the total number of cars used is minimized.MediumCoding· Google
  23. 767Write a function to balance parentheses in a given string by removing the fewest characters possible. Ensure that each opening parenthesis has a corresponding closing parenthesis and each pair is properly nested.MediumCoding· Meta
  24. 768Given a string with parentheses, write a function that removes the minimum number of characters to balance the parentheses.MediumCoding· Meta