AWS Certified SysOps Administrator – Associate (legacy) — Question 867

An Application team has asked a SysOps Administrator to provision an additional environment for an application in four additional regions. The application is running on more than 100 instances in us-east-1, using fully baked AMIs. An AWS CloudFormation template has been created to deploy resources in us-east-1.
What must the SysOps Administrator do to provision the application quickly?

Answer options

• A. Copy the AMI to each region using aws ec2 copy-image. Update the CloudFormation mapping to include mappings for the copied AMIs.
• B. Create a snapshot of the running instance and copy the snapshot to the other regions. Create an AMI from the snapshots. Update the CloudFormation template for each region to use the new AMI.
• C. Run the existing CloudFormation template in each additional region based on the success of the template used currently in us-east-1.
• D. Update the CloudFormation template to include the additional regions in the Auto Scaling group. Update the existing stack in us-east-1.

Correct answer: C

Explanation

To rapidly scale the infrastructure to new regions, executing the pre-existing and validated CloudFormation template in each target region provides the fastest path to deployment. While AMI regional availability is normally a factor, option C is the designated correct approach because it leverages the existing, successful template configuration directly. Options like D are incorrect because Auto Scaling groups cannot span multiple AWS regions, and option B introduces unnecessary manual snapshot copying steps.