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
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4,310 questions

  1. 1081Two pointerCoding· Amazon
  2. 1082Two-Pointer approachCoding· Cisco
  3. 1083Two-Pointer BasedCoding· AAugnito, Cisco Meraki
  4. 1084Two-Pointer ProblemCoding· Wayfair
  5. 1085Ugly NumberEasyCoding· Amazon
  6. 1086Ugly Number IIIMediumCoding· Media.net
  7. 1087Unique SubstringsCoding· Goldman Sachs
  8. 1088Valid AnagramCoding· Adobe
  9. 1089Valid Binary Search TreeCoding· HubSpot
  10. 1090Valid SudokuMediumCoding· PayPal
  11. 1091Valid Triangle NumberCoding· Zoho
  12. 1092Validate Parentheses String with WildcardsCoding· VVegapay
  13. 1093Verbal Arithmetic PuzzleHardCoding· Wells Fargo
  14. 1094Wildcard matchingCoding· Amazon
  15. 1095Word FrequencyMediumCoding· NetApp
  16. 1096Zig-Zag level order traversalCoding· SASigmoid Analytics
  17. 1097Zigzag ConversionCoding· PayPal
  18. 1098Zigzag Level Order TraversalCoding· Ather Energy, Zoho
  19. 10993 cuts to cut the round cake into 8 equal piecesTechnical· Samsung
  20. 1100Course ScheduleMediumCoding· Zoho
  21. 1101Validate IP AddressMediumCoding· Salesforce
  22. 1102The candidate reports a design question about detecting a prolonged stopped cab in a safety-sensitive journey and triggering an alert. Employer confirmation is absent. The source's scenario details are incomplete for implementation.MediumSystem designData· Delhivery
  23. 1103The employer publishes a reproducible data-ingestion and analysis exercise using public city datasets, with an emphasis on code, documentation and results. Consult the opened source for current scope rather than stale search snippets.MediumCodingData· NPNYC Planning
  24. 1104The public task uses local dbt/DuckDB subscription models and a capped retained-revenue cohort report. Follow the source for its complete task and rules; we do not reproduce its datasets or submission instructions.HardCodingData· Tracksuit