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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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174 questions

  1. 25Design a cache controller.HardSystem design· Google
  2. 26Design a solution to move the data from Cassandra in System X to system Y.HardSystem design· Google
  3. 27Design a content delivery network (CDN).HardTechnical· Google
  4. 28Design a denoising system for sounds.HardSystem design· Google
  5. 29Design a distributed file system.HardSystem design· Databricks, Google
  6. 30Design an educational product for YouTube.HardProduct· Google
  7. 31Design a mobile Gmail app for Google engineers who are the first humans to land on Mars.HardProduct· Google
  8. 32Design an onboarding flow for a business transitioning to Google Cloud Platform.HardProduct· Google, Google Cloud (GCP)
  9. 33Design the architecture for Google Maps to load in under 100ms.HardTechnical· Google
  10. 34Design a solution to map unmapped places in Google Maps.HardProduct· Google
  11. 35Design a high-tech gym.HardProduct· Google
  12. 36You're a PM for a new device, which is a time machine. How would you design the interface?HardProduct· Google
  13. 37Design a launch strategy for Google Glass.HardProduct· Google
  14. 38Design a lawn mower.HardProduct· Google
  15. 39Design a metrics and logging service.HardSystem designTechnical· Booking.com, Google
  16. 40Design an ML experiment tracking and analysis platform.HardAI MLSystem design· Google
  17. 41Design a mobile app for Disney theme parks.HardProduct· Google
  18. 42Design a next-generation elevator.HardProduct· Google, Meta
  19. 43Design an online ticketing platform to compete with Ticketmaster.HardProduct· Google
  20. 44Design a reservation and payment system for a parking garage.HardSystem design· Amazon, AtoB
  21. 45Design a product for airports.HardProduct· Google
  22. 46Design a refrigerator for the blind.HardProduct· Google
  23. 47Design a system for Sundar Pichai to communicate with business partners abroad with unlimited resources.HardProduct· Google
  24. 48Design a ride-hailing app for the blind.HardProduct· Google