Which solution will enable this change?

A company developed an AWS CloudFormation template used to create all new Amazon DynamoDB tables in its AWS account. The template configures provisioned throughput capacity using hard-coded values. The company wants to change the template so that the tables it creates in the future have independently configurable read and write capacity units assigned.

Which solution will enable this change?
A . Add values for the rcuCount and wcuCount parameters to the Mappings section of the template.
Configure DynamoDB to provision throughput capacity using the stack’s mappings.
B . Add values for two Number parameters, rcuCount and wcuCount, to the template. Replace the hard-coded values with calls to the Ref intrinsic function, referencing the new parameters.
C . Add values for the rcuCount and wcuCount parameters as outputs of the template. Configure DynamoDB to provision throughput capacity using the stack outputs.
D . Add values for the rcuCount and wcuCount parameters to the Mappings section of the template.
Replace the hard-coded values with calls to the Ref intrinsic function, referencing the new parameters.

View Answer

Answer: B

Explanation:

Input parameter and FindInMap You can use an input parameter with the Fn::FindInMap function to refer to a specific value in a map. For example, suppose you have a list of regions and environment types that map to a specific AMI ID. You can select the AMI ID that your stack uses by using an input parameter (EnvironmentType). To determine the region, use the AWS::Region pseudo parameter, which gets the AWS Region in which you create the stack. https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/parameters-section-structure.html