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DOP-C02 · Question #362

A company is using AWS CloudFormation to perform deployments of its application environment. A deployment failed during a recent update to the existing CloudFormation stack. A DevOps engineer discover

The correct answer is A. Create an Amazon Simple Notification Service (Amazon SNS) topic. Subscribe the DevOps lead. AWS Config managed rule: The CLOUDFORMATION_STACK_DRIFT_DETECTION_CHECK managed rule automatically detects drift (manual changes) in CloudFormation stacks, which directly addresses the need to detect manual modifications of resources. Amazon SNS for alerts: By creating an SNS top

Submitted by daniela_cl· Mar 6, 2026Configuration Management & Infrastructure as Code

Question

A company is using AWS CloudFormation to perform deployments of its application environment. A deployment failed during a recent update to the existing CloudFormation stack. A DevOps engineer discovered that some resources in the stack were manually modified. The DevOps engineer needs a solution that detects manual modification of resources and sends an alert to the DevOps lead. Which solution will meet these requirements with the LEAST operational effort?

Options

  • ACreate an Amazon Simple Notification Service (Amazon SNS) topic. Subscribe the DevOps lead
  • BTag all CloudFormation resources with a specific tag. Create an AWS Config custom rule by
  • CCreate an Amazon Simple Notification Service (Amazon SNS) topic. Subscribe the DevOps lead
  • DCreate an AWS Config managed rule that has the

How the community answered

(33 responses)
  • A
    79% (26)
  • B
    12% (4)
  • C
    6% (2)
  • D
    3% (1)

Explanation

AWS Config managed rule: The CLOUDFORMATION_STACK_DRIFT_DETECTION_CHECK managed rule automatically detects drift (manual changes) in CloudFormation stacks, which directly addresses the need to detect manual modifications of resources. Amazon SNS for alerts: By creating an SNS topic and subscribing the DevOps lead to it, you can easily send notifications when drift is detected. EventBridge for triggering notifications: Setting up an EventBridge rule that triggers on the NON_COMPLIANT status from the AWS Config rule allows for automated alerting without the need for custom logic or additional resources.

Topics

#AWS Config#Configuration drift#Managed rules#SNS#CloudFormation

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