Exam AWS Certified Solutions Architect - Professional topic 1 question 312 discussion

A. ROLLBACK_IN_PROGRESS

A. ROLLBACK_IN_PROGRESS Explanation: In AWS CloudFormation, the ROLLBACK_IN_PROGRESS status indicates that a stack update or stack creation has failed, and CloudFormation is in the process of rolling back the changes. This status is triggered when an error occurs during the execution of a CloudFormation stack operation, and the stack is being reverted to its previous state. The other options mentioned (B, C, and D) do not represent failure states: DELETE_IN_PROGRESS: This status indicates that a stack deletion is in progress. UPDATE_COMPLETE_CLEANUP_IN_PROGRESS: This status indicates that a stack update has completed, and CloudFormation is performing cleanup operations. REVIEW_IN_PROGRESS: This status indicates that a stack operation is being reviewed and has not yet started.

A is my choice

A. ROLLBACK_IN_PROGRESS

Answer is A

The answer is ROLLBACK_IN_PROGRESS.

If you create a change set for a new stack, AWS CloudFormation creates a stack with a unique stack ID, but no template or resources. The stack will be in the REVIEW_IN_PROGRESS state until you execute the change set.

going for A https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/using-cfn-describing-stacks.html REVIEW_IN_PROGRESS Ongoing creation of one or more stacks with an expected StackId but without any templates or resource ROLLBACK_IN_PROGRESS Ongoing removal of one or more stacks after a failed stack creation or after an explicitly cancelled stack creation

I will go for D. Other three options all describing one ongoing state of the stack, and will eventually advanced to next state once the action performing is completed or failed. However, REVIEW_IN_PROGRESS is a failure state that the stack was stock, and only you can do something on it to put it forward another state.