Skip to content
RED SAGSkills

Medium Backend Developer questions

34 questions · 10 points each for a correct first answer.

easymediumhard
  1. 1.The N+1 query problemmedium
  2. 2.Cache-aside patternmedium
  3. 3.Logging out with JWTsmedium
  4. 4.Isolation levels and dirty readsmedium
  5. 5.Offset or cursor paginationmedium
  6. 6.Token bucket rate limitermedium
  7. 7.At-least-once deliverymedium
  8. 8.Composite index column ordermedium
  9. 9.More consumers than partitionsmedium
  10. 10.Two awaits that could run togethermedium
  11. 11.A 64-bit id changes after parsingmedium
  12. 12.Response to a matching If-None-Matchmedium
  13. 13.Optimistic lock update hits 0 rowsmedium
  14. 14.Why access tokens are short-livedmedium
  15. 15.Webhook signature never matchesmedium
  16. 16.Errors during every deploymedium
  17. 17.Liveness probe restarts every podmedium
  18. 18.Retrying after a shared outagemedium
  19. 19.What a circuit breaker doesmedium
  20. 20.Redis structure for a leaderboardmedium
  21. 21.Index ignored for lower(email)medium
  22. 22.Benefit of INCLUDE in an indexmedium
  23. 23.Risk of "import image from URL"medium
  24. 24.Any user can read any invoicemedium
  25. 25.Saving req.body directlymedium
  26. 26.Testing code that calls a payment APImedium
  27. 27.Following one request across servicesmedium
  28. 28.Fine average, unhappy usersmedium
  29. 29.Docker rebuild reinstalls everythingmedium
  30. 30.One bad message blocks the queuemedium
  31. 31.Worker crash with auto-ackmedium
  32. 32.Async callback inside forEachmedium
  33. 33.Keeping a cached price freshmedium
  34. 34.CDN serves one user's profile to anothermedium