Q13 Service Bus Domain 3 · 20–25% of exam Priority · Real Exam Choose 2

Which TWO conditions cause a message to be moved to the dead-letter queue automatically?

  1. A DeliveryCount exceeds MaxDeliveryCount (correct answer)
  2. B TimeToLive expires while dead-lettering on expiration is enabled (correct answer)
  3. C The consumer completes the message
  4. D The lock is renewed
  5. E Duplicate detection discards a repeat

Shortcut: Exhausting the delivery attempts and TTL expiry with EnableDeadLetteringOnMessageExpiration are the two automatic paths to the dead-letter sub-queue. Completing settles the message successfully, renewal simply extends the lock, and duplicate detection silently drops the repeat rather than dead-lettering it.