Given a subscription configured with ackDeadlineSeconds=10, what happens if a subscriber does not acknowledge a message within 10 seconds?

medium📝 service behavior Q4 of 15

GCP - Cloud Pub/Sub

Given a subscription configured with ackDeadlineSeconds=10, what happens if a subscriber does not acknowledge a message within 10 seconds?

AThe message is redelivered to the subscriber

BThe message is deleted permanently

CThe subscription is deleted automatically

DThe message is marked as acknowledged

Step-by-Step Solution

Solution:

Step 1: Understand ackDeadlineSeconds meaning
This setting defines how long a subscriber has to acknowledge a message before it is considered unacknowledged.
Step 2: Determine message behavior after deadline
If not acknowledged within 10 seconds, the message becomes available again for redelivery.
Final Answer:
The message is redelivered to the subscriber -> Option A
Quick Check:
Unacknowledged message = Redelivery [OK]

Quick Trick: Unacknowledged messages get redelivered after ack deadline [OK]

Common Mistakes:

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