Infrastructure as Code with CloudFormation and CDK Flashcards

Which CloudFormation resource property allows you to specify that a resource must be created before another resource?

Answer: DependsOn

The DependsOn attribute ensures CloudFormation creates the specified resource before the resource that contains the DependsOn property.

What CloudFormation policy prevents a resource from being deleted when the stack is deleted?

Answer: DeletionPolicy: Retain

Setting DeletionPolicy to Retain preserves the resource after the CloudFormation stack is deleted.

Which AWS CDK construct level represents a single AWS resource with sensible defaults?

Answer: L2 (Resource)

L2 constructs are curated AWS resource constructs with sensible defaults that abstract CloudFormation resource properties.

What CloudFormation function retrieves the value of a parameter or resource output from the same template?

Answer: Ref

The Ref function returns the value of a parameter or the default attribute of a resource defined in the same CloudFormation template.

In AWS CDK, which command synthesizes the CDK app into CloudFormation templates?

Answer: cdk synth

The cdk synth command synthesizes your CDK application and outputs the equivalent CloudFormation templates.

Which CloudFormation feature allows you to share output values from one stack with another stack in the same account and region?

Answer: Cross-stack references using Exports and Fn::ImportValue

Cross-stack references use Outputs with Export names in one stack and Fn::ImportValue in another stack to share values within the same region.