Exam Professional Cloud DevOps Engineer topic 1 question 27 discussion

A rollback experiment

A. First and foremost, reduce user impact.

Option A

Why are there so many wrong answers listed as "Correct Answers" ? For example for this question A is obviously correct and the most voted. Why does it say D is correct?

We need to rollback the current deployment so that user are not negatively impacted, then we can go with post-mortem, root cause alaysis and fixes.

A. Roll back the experimental canary release. Explanation: When you receive a spike in the number of 500 errors sent to users and increased latency after deploying a new feature, it is important to take immediate action to minimize the negative impact on users. The first step should be to roll back the experimental canary release. This will remove the new feature from production and revert the system to its previous state, which should reduce the number of errors and decrease latency. After rolling back the canary release, you can start monitoring latency, traffic, errors, and saturation (Option B) to determine the impact of the rollback and to make sure that the system is stable. You can also record data for the postmortem document of the incident (Option C) to learn from the incident and to improve future releases. Lastly, you can trace the origin of 500 errors and the root cause of increased latency (Option D) after rolling back the canary release to understand what went wrong and to prevent similar issues from happening again in the future.

Ans: A Exam passed and taken on 19/12/2022, 50/50 from this dump without buying the full access and looking for 'devops' word here: https://www.examtopics.com/discussions/google/1/

The first step that you do to reduce issue is to rollback, then comes the identifying and fixing the errors part

Rollback is the best option to avoid customer impact. Latency issue can be triaged in staging env with performance test hence my answer is A.

Agree with A

A - Rollback the canary to bring back stability to production; then review logs to find out what caused the issues.

Answer - A for quickly minimizing the negative impact on users

The correct answer is D, the deployment is Canary, hence a very small amount of user traffic, the whole purpose of Canary here will be to find the origin or errors and fix it before releasing to all the users.

A is correct

A should be the answer. error happens after canary release so we are not sure for actual cause. so first we should rollback canary release.

Ans : A

Has to be A