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4,310 interview questions, answered.

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

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766 questions

  1. 193Design a voting app.MediumProduct· Google, Meta
  2. 194Design a washing machine for Google.HardProduct· Google, TikTok
  3. 195Design a web crawler.MediumSystem design· Anthropic, Google
  4. 196Design YouTube's video recommendation engine.HardTechnical· Google
  5. 197Design a load balancer.MediumSystem design· Google, Mastercard
  6. 198Design a key-value store.HardSystem design· Accenture, Anthropic
  7. 199Go into detail about a login endpoint.MediumTechnical· Google
  8. 200How would you determine insurance pricing for Waymo?HardData· Google
  9. 201You are a grocery store owner/manager. How do you determine how many self-checkout machines you need?MediumData· Google
  10. 202Tell me about a time when you had to make a difficult trade-off decision on a roadmap.MediumBehavioral· DocuSign, Google
  11. 203Tell me about a time when you had a disagreement with your manager.MediumBehavioral· Amazon, Gameberry Labs
  12. 204How would you double the revenue for Google Maps?HardProduct· Google
  13. 205How many drones would be needed to deliver all FedEx packages in the US?HardProduct· Google
  14. 206Sort a list of natural numbers and their squares in the most efficient way possible.MediumCoding· Google
  15. 207Pick an airport and estimate the number of people going through the metal detectors in a day.HardProduct· Google
  16. 208Pick an airport and estimate the number of people going through the security scan every day.MediumProductSystem design· Google
  17. 209Estimate the annual cost of running YouTube.HardProduct· Google
  18. 210Estimate the number of tires purchased annually by a large car dealership in San Jose, California.MediumProduct· Google
  19. 211Estimate the bandwidth (bits/s) of a 747 crossing the Atlantic filled with CDROMs.MediumProduct· Google
  20. 212Estimate the number of cinema tickets sold in the US in one year.MediumProduct· Google
  21. 213Estimate the cost of storing Google Earth photos.HardProduct· Google
  22. 214Estimate the annual cost of managing Google Photos. What factors would you consider in your calculation?HardProduct· Google
  23. 215Estimate how much it costs to run Youtube for a dayHardProduct· Google
  24. 216Estimate the number of Gmail users in the US.MediumProduct· Google