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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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135 questions

  1. 1LFU CacheHardCoding· BloomBerg, Meta
  2. 2Making a large islandHardCoding· Meta
  3. 3Reverse PairsHardCoding· Meta
  4. 4Sliding Window MaximumHardCoding· BharatPe, Cisco Meraki
  5. 5As the PM for Alexa, which metrics would you prioritize?HardDataProduct· Meta
  6. 6How would you authenticate reviews for Facebook Locals?HardProductSystem design· Meta
  7. 7Imagine you are a data scientist for Instagram. How would you balance ads and follower posts and how would you monitor its effectiveness.HardData· Meta
  8. 8Design a solution for borrowing and lending on Facebook.HardProductSystem design· Meta
  9. 9How would you build a Facebook product for blood donation?HardProductSystem design· Meta
  10. 10Build a new feature for natural disaster response.HardProduct· Meta
  11. 11How would you build a system on a ticketing website to manage high traffic during simultaneous ticket purchases?HardProduct· Google, Meta
  12. 12How would you build TinyURL?HardSystem designTechnical· Google, Meta
  13. 13If Mark Zuckerberg asked you to create a product for athletes, what would you build?HardProduct· Meta
  14. 14Imagine you're a PM for Facebook. Design a product for teens.HardProduct· Meta
  15. 15Design an AI product for a ride sharing app.HardAI MLProduct· Meta
  16. 16Design an Amazon price tracker.HardSystem design· Freshworks, Meta
  17. 17Design APIs for Facebook live commenting.HardSystem designTechnical· Meta
  18. 18Design an app for gardening.HardProduct· Google, Meta
  19. 19Design an AR/VR product for individuals over 50 years old.HardProduct· Meta
  20. 20Design an auto-complete feature.HardSystem design· LinkedIn, Meta
  21. 21Design a product for borrowing and lending.HardProduct· Meta
  22. 22Design Dropbox.HardSystem design· Dropbox, Meta
  23. 23Design an events feature for a kids' messenger app.HardProductSystem design· Meta
  24. 24Design Facebook Messenger.HardSystem design· Meta, Microsoft