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Exam Professional Cloud Developer topic 1 question 320 discussion

Actual exam question from Google's Professional Cloud Developer
Question #: 320
Topic #: 1
[All Professional Cloud Developer Questions]

You have an application running in production on Cloud Run. Your team needs to change one of the application’s services to return a new field. You want to test the new revision on 10% of your clients using the least amount of effort. You also need to keep your service backward compatible.

What should you do?

  • A. Replace the current service with the new revision. Deploy the new revision with no traffic allocated. After the deployment, split the traffic between the previous service and the new revision.
  • B. Update the current service with the new changes. Deploy the new revision. After the deployment, split the traffic between the current service and the new revision.
  • C. Update the current service with the new changes. Deploy the new revision with no traffic allocated. Split the traffic between the current service and the new revision.
  • D. Replace the current service with the new revision. Deploy the new revision. Create a load balancer to split the traffic between the previous service and the new revision.
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Suggested Answer: C 🗳️
by anshad666 at Oct. 12, 2024, 9:37 a.m.

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anshad666
1 month, 1 week ago
Selected Answer: C
Backward Compatibility: By deploying the new revision with no traffic allocated initially, you ensure that existing clients continue to receive responses from the current service without any disruptions. This approach preserves backward compatibility, allowing clients that rely on the previous response structure to continue functioning. Traffic Splitting: After deploying the new revision, you can then proceed to split the traffic between the current service and the new revision. In this case, directing 10% of the traffic to the new revision allows you to test the changes with a subset of users while monitoring for any issues.
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