Coach note

System-design questions are about the trade-offs you make when no answer is obviously right. Interviewers want to see scope, the bottleneck you pick, and the rejected designs you can articulate.

System design · Architecture

Design a system that lets users bookmark articles and retrieve them later. You expect 100K active users who each save about 10 articles per month. What's your data model and how do you handle retrieval?

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