🌱 System Design (Beginner) · Building Blocks · cozy lesson
Queues & Pub/Sub
10 min · 1 min read · no scary math, promise
🤖
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Producer → queue (SQS/Kafka) → consumer. At-least-once → idempotent handler. Pub/sub: one event, many fans (notify + analytics).
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Check your understanding
Correct answers earn XP (once each).
1. Queue gives…
2. Poison message?
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