GCP - Cloud Pub/Sub
In a Pub/Sub subscription with message ordering enabled, if messages with ordering key 'B' arrive in order M4, M5, M6, but the subscriber processes M5 before M4, what is the expected behavior?
In a Pub/Sub subscription with message ordering enabled, if messages with ordering key 'B' arrive in order M4, M5, M6, but the subscriber processes M5 before M4, what is the expected behavior?
medium📝 Predict Output Q5 of 15
Step-by-Step Solution
Solution:
Step 1: Understand delivery vs processing
Ordering guarantees delivery order, not processing order by subscriber.Step 2: Recognize subscriber control
Subscriber can process messages in any order but receives them ordered.Final Answer:
The subscriber will receive messages in order M4, M5, M6 regardless of processing order -> Option CQuick Check:
Ordering ensures delivery order, not processing order [OK]
Quick Trick: Ordering controls delivery, not subscriber processing [OK]
Common Mistakes:
- Confusing delivery order with processing order
- Thinking messages get dropped if processed out of order
- Assuming subscription disables ordering automatically
Master "Cloud Pub/Sub" in GCP
Want More Practice?
15+ quiz questions · All difficulty levels · Free
Free Signup - Practice All QuestionsMore GCP Quizzes