Grokking the System Design Interview, Volume II
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Google News: Requirements

Step 2: Requirements Clarification

2.1 Functional Requirements

  • User subscription management. Users pick and manage the topics they follow. They can subscribe to channels or sources like CNN or BBC. They can subscribe to categories like Politics, Sports, or Tech. They can subscribe to entities or keywords like "the Olympics" or a favorite artist. They can also unsubscribe or change preferences at any time.

  • Content ingestion. The system gathers articles from external sources all the time

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