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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. 145Design the system architecture for WhatsApp.HardSystem designTechnical· Meta, WhatsApp
  2. 146Design a Tic Tac Toe game that allows remote play.MediumSystem design· Amazon, Twitter
  3. 147What is the time it takes to send a signal from one computer to all other computers?MediumSystem designTechnical· Coinbase, Intuit
  4. 148Design a URL shortener.HardSystem design· Amazon, Discord
  5. 149What is an API and how does it work?MediumSystem designTechnical· Apple, Meta
  6. 150How should Yelp expand into Asia?HardSystem design· Yelp
  7. 151How does Alexa process voice commands?MediumSystem designTechnical· Amazon
  8. 152For Amazon Video Service, would you recommend keeping or removing the offering?MediumProductSystem design· Amazon
  9. 153What happens behind the scenes when you visit a Bitly URL in your web browser?MediumSystem design· LinkedIn
  10. 154How would you build an audio product for Facebook?HardProductSystem design· Meta
  11. 155If you had unlimited resources at Google, what would you build and why?MediumProductSystem design· Google
  12. 156How do concurrent user flows work in Google Docs?MediumSystem designTechnical· Google
  13. 157Design a Distributed LRU CacheMediumSystem design· Stripe, Walmart Labs
  14. 158Design a kitchen.MediumProductSystem design· Microsoft
  15. 159Design an AB test system.HardSystem design· Affirm
  16. 160Design an AI data product.MediumProductSystem design· Accenture, LinkedIn
  17. 161Design an app where customer listening history is collected after they have listened to a song for more than 30 seconds for analytics use.MediumAI MLSystem design· Amazon
  18. 162Design an app for newcomers in a city to find doctors.MediumProductSystem design· Meta
  19. 163How would you design an autocomplete search results page?MediumSystem designTechnical· Google
  20. 164Design a solution for borrowing and lending goods among neighbors on Facebook.MediumProductSystem design· Meta
  21. 165Design browser history.MediumSystem design· Oracle, TikTok
  22. 166Design a cashless candy dispensing machine.MediumSystem design· Amazon
  23. 167How would you design chess.com?HardProductSystem design· Meta, Panorama Education
  24. 168Design a system that recommends the next Confluence pages a user should view.HardAI MLSystem design· Atlassian, PayPal