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Answer: Exported Output Values in CloudFormation must have unique names within a single Region
"Exported Output Values in CloudFormation must have unique names within a single Region" Using CloudFormation, you can create a template that describes all the AWS resources that you want (like Amazon EC2 instances or Amazon RDS DB instances), and AWS CloudFormation takes care of provisioning and configuring those resources for you. A CloudFormation template has an optional Outputs section which declares output values that you can import into other stacks (to create cross-stack references), return in response (to describe stack calls), or view on the AWS CloudFormation console. For example, you can output the S3 bucket name for a stack to make the bucket easier to find. You can use the Export Output Values to export the name of the resource output for a cross-stack reference. For each AWS account, export names must be unique within a region. In this case, we would have a conflict within us-east-2.
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Your international organization utilizes AWS CloudFormation to manage its IT infrastructure on the AWS Cloud. In the us-east-1 Region, an employee has created a CloudFormation stack named 'Application1' and has defined an exported output called 'ELBDNSName'. Concurrently, another employee in the us-east-2 Region has created a separate CloudFormation stack for another application called 'Application2' and has also defined an exported output with the name 'ELBDNSName'. When the first employee attempted to deploy the 'Application1' CloudFormation stack in the us-east-2 Region, an error was encountered. What is the cause of this error?
A
Exported Output Values in CloudFormation must have unique names across all Regions
B
Output Values in CloudFormation must have unique names within a single Region
C
Output Values in CloudFormation must have unique names across all Regions
D
Exported Output Values in CloudFormation must have unique names within a single Region
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