AWS CodeDeploy is used to configure adeployment group to automatically roll-back to the last known good revision when a deployment fails. During roll-back, files required for deployment to earlier revision cannot be retrieved by AWS CodeDeploy. Which of the following actions can be executed for successful roll-back? Choose 2 correct options.

Answer options:

A.Use Manual Roll Back instead of Automatic Roll-Back.
B.Manually Add required files to Instance.
C.Use an existing application revision.
D.Map CodeDeploy to access those files from S3 buckets.
E.Create a new application revision.

Correct Answer –B, E
During AWS CodeDeploy automatic roll-back, it will try to retrieve files that were part of previous versions. If these files are deleted or missing, you need to manually add those files to Instance or create a new application revision.
Option A is incorrect as if files required for deployment are overwritten by earlier deployment. Files will not be available for CodeDeploy & deployment will fail even in case of Manual roll-back.
Option C is incorrect as AWS CodeDeploy will not find missing files using an existing application revision.
Option D is incorrect as CodeDeploy does not automatically access these files from S3 buckets.
For more information on CodeDeploy Rollback, refer to the following URL-
https://docs.aws.amazon.com/codedeploy/latest/userguide/deployments-rollback-and-redeploy.html