AWS DevOps Engineer Professional Practice Test

How can you change parameter values for specific regions in a CloudFormation StackSet?

1. By updating the main stack template directly

2. Using the "Override StackSet parameters" functionality

3. Through the AWS CLI without specifying regions

4. By creating a new StackSet for those regions

The correct answer is: Using the "Override StackSet parameters" functionality

The ability to change parameter values for specific regions in a CloudFormation StackSet is indeed accomplished by using the "Override StackSet parameters" functionality. This feature allows users to specify different parameter values for individual accounts and regions while maintaining the primary CloudFormation template. When deploying updates to a StackSet, the base parameters defined in the template will apply across all regions and accounts. However, there may be scenarios where certain parameters need to be adjusted only for specific regions—this is where the override capability comes into play. By utilizing this functionality, you can tailor the deployment to meet the needs of each region without the need to alter the main template or create an entirely new StackSet. In contrast, directly updating the main stack template does not allow for region-specific parameter adjustments since those changes would apply globally. Using the AWS CLI without specifying regions would not allow for distinctions between regional parameter settings and would typically lead to applying uniform parameters across the board. Similarly, creating a new StackSet for particular regions would be an inefficient approach, as it would require duplication of the existing work and management of multiple StackSets rather than simply updating existing ones with specific overrides.