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What is the purpose of a dead letter queue when consuming messages?

  1. A To store successfully processed messages
  2. B To capture messages that repeatedly fail processing so they are not lost or retried forever
  3. C To prioritise urgent messages
  4. D To compress message payloads
Answer

To capture messages that repeatedly fail processing so they are not lost or retried forever

Without one, a poison message either blocks the queue or is silently discarded. The DLQ preserves it for investigation.

All NodeJS MCQs

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