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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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230 questions

  1. 97How would you design a three-tier architecture?MediumSystem design· Amazon
  2. 98Design TikTok.HardSystem design· Google, Meta
  3. 99Design a timer system.MediumProductSystem design· Google
  4. 100Design a travel app experience for Meta.MediumProductSystem design· LinkedIn
  5. 101Design a truck tracking system that supports filtering by truck number and includes an interface for updating driver status.MediumSystem design· Uber
  6. 102Design a typeahead box for a search engine.HardSystem design· Adobe, Amazon
  7. 103Design Uber.HardSystem design· Uber
  8. 104Design Uber Eats.HardSystem design· Amazon, Meta
  9. 105You're a PM at Uber; design a smartwatch app.MediumProductSystem design· Microsoft
  10. 106Design a vending machine for people with disabilities.MediumProductSystem design· Affirm
  11. 107Design a visual landmark recognition system.HardSystem designTechnical· Google
  12. 108Design a web crawler.MediumSystem design· Anthropic, Google
  13. 109Design a web crawler to download content from www.example.com without detection.HardSystem design· Meta
  14. 110Design YouTube.HardProductSystem design· Wealthfront
  15. 111Design a load balancer.MediumSystem design· Google, Mastercard
  16. 112Design a key-value store.HardSystem design· Accenture, Anthropic
  17. 113Design an elevator for blind users.MediumProductSystem design· GCGoogle Cloud (GCP)
  18. 114Pick an airport and estimate the number of people going through the security scan every day.MediumProductSystem design· Google
  19. 115Estimate the storage needs for Google Photos on Pixel phones.HardProductSystem design· Google
  20. 116Estimate the storage needed for a day's worth of information from your brain.HardProductSystem design· Google
  21. 117Estimate the amount of storage needed for Google Photos.MediumProductSystem design· Google
  22. 118What metrics would you track to evaluate the performance of your ML pipeline?MediumAI MLSystem design· PAPerplexity AI
  23. 119Explain the leader follower election in a distributed system.MediumSystem design· Microsoft
  24. 120How would you handle Gmail accounts when two users create the same username from different countries?MediumDataProduct· Google