Which status represents a failure state in AWS CloudFormation?
A.UPDATE_COMPLETE_CLEANUP_IN_PROGRESS
B.DELETE_COMPLETE_WITH_ARTIFACTS
C.
ROLLBACK_IN_PROGRESS
D.ROLLBACK_FAILED
Explanation:
ROLLBACK_IN_PROGRESS means an UpdateStack operation failed and the stack is in the process of trying to return
to the valid, pre-update state. UPDATE_COMPLETE_CLEANUP_IN_PROGRESS means an update was successful,
and CloudFormation is deleting any replaced, no longer used resources. ROLLBACK_FAILED is not a CloudFormation
state (but UPDATE_ROLLBACK_FAILED is). DELETE_COMPLETE_WITH_ARTIFACTS does not exist at all.
http://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks.html