Google Associate Cloud Engineer
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After deploying a website for selling used smartphones on App Engine, you noticed the user interface breaks for some users in the latest release, an issue not present in prior versions. To immediately revert to an older version and mitigate this issue, what should you do?
After deploying a website for selling used smartphones on App Engine, you noticed the user interface breaks for some users in the latest release, an issue not present in prior versions. To immediately revert to an older version and mitigate this issue, what should you do?
Explanation:
B is correct because routing all the traffic back to a previous version is the fastest way to roll back a change on App Engine. This method allows you to quickly revert to a stable version without deploying new instances or making DNS changes. A is incorrect as deploying a separate version and changing DNS settings introduces unnecessary complexity. C is incorrect because 'gcloud app restore' is not a valid command for this purpose. D is incorrect since there's no 'revert' option on the App Engine page in the GCP Console. For more details, refer to Google Cloud's documentation on traffic migration.