Reliability interview questions

15 real Reliability questions from the Message Queues bank, as asked in Indian campus drives and tech interviews. Every question has a verified answer and an AI-tutor explanation on placd — free to start.

1. What is Acknowledgment?

Junior
  1. A.resending a message to a consumer because the previous attempt was not acknowledged in time or failed
  2. B.a record that repeatedly fails processing and would loop forever if not diverted aside
  3. C.the signal a consumer sends back to confirm a message was received and may be removed from the queue
  4. D.the property by which messages are persisted to disk so they survive a broker restart or crash
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3. Which statement is correct?

Junior
  1. A.Acknowledgment — the signal a consumer sends back to confirm a message was received and may be removed from the queue
  2. B.Acknowledgment — a record that repeatedly fails processing and would loop forever if not diverted aside
  3. C.Acknowledgment — the property by which messages are persisted to disk so they survive a broker restart or crash
  4. D.Acknowledgment — a separate destination where messages are moved after repeatedly failing processing or exceeding a retry limit
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4. What is Dead-letter queue?

Junior
  1. A.the signal a consumer sends back to confirm a message was received and may be removed from the queue
  2. B.a separate destination where messages are moved after repeatedly failing processing or exceeding a retry limit
  3. C.resending a message to a consumer because the previous attempt was not acknowledged in time or failed
  4. D.a record that repeatedly fails processing and would loop forever if not diverted aside
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6. Which statement is correct?

Junior
  1. A.Dead-letter queue — resending a message to a consumer because the previous attempt was not acknowledged in time or failed
  2. B.Dead-letter queue — a record that repeatedly fails processing and would loop forever if not diverted aside
  3. C.Dead-letter queue — the property by which messages are persisted to disk so they survive a broker restart or crash
  4. D.Dead-letter queue — a separate destination where messages are moved after repeatedly failing processing or exceeding a retry limit
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7. What is Redelivery?

Mid
  1. A.a record that repeatedly fails processing and would loop forever if not diverted aside
  2. B.resending a message to a consumer because the previous attempt was not acknowledged in time or failed
  3. C.a separate destination where messages are moved after repeatedly failing processing or exceeding a retry limit
  4. D.the property by which messages are persisted to disk so they survive a broker restart or crash
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9. Which statement is correct?

Mid
  1. A.Redelivery — a record that repeatedly fails processing and would loop forever if not diverted aside
  2. B.Redelivery — resending a message to a consumer because the previous attempt was not acknowledged in time or failed
  3. C.Redelivery — a separate destination where messages are moved after repeatedly failing processing or exceeding a retry limit
  4. D.Redelivery — the signal a consumer sends back to confirm a message was received and may be removed from the queue
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10. What is Durability?

Mid
  1. A.the property by which messages are persisted to disk so they survive a broker restart or crash
  2. B.a separate destination where messages are moved after repeatedly failing processing or exceeding a retry limit
  3. C.the signal a consumer sends back to confirm a message was received and may be removed from the queue
  4. D.resending a message to a consumer because the previous attempt was not acknowledged in time or failed
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12. Which statement is correct?

Mid
  1. A.Durability — a separate destination where messages are moved after repeatedly failing processing or exceeding a retry limit
  2. B.Durability — the property by which messages are persisted to disk so they survive a broker restart or crash
  3. C.Durability — the signal a consumer sends back to confirm a message was received and may be removed from the queue
  4. D.Durability — a record that repeatedly fails processing and would loop forever if not diverted aside
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13. What is Poison message?

Senior
  1. A.the signal a consumer sends back to confirm a message was received and may be removed from the queue
  2. B.a separate destination where messages are moved after repeatedly failing processing or exceeding a retry limit
  3. C.the property by which messages are persisted to disk so they survive a broker restart or crash
  4. D.a record that repeatedly fails processing and would loop forever if not diverted aside
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15. Which statement is correct?

Senior
  1. A.Poison message — the signal a consumer sends back to confirm a message was received and may be removed from the queue
  2. B.Poison message — resending a message to a consumer because the previous attempt was not acknowledged in time or failed
  3. C.Poison message — a separate destination where messages are moved after repeatedly failing processing or exceeding a retry limit
  4. D.Poison message — a record that repeatedly fails processing and would loop forever if not diverted aside
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