AWS Certified Solutions Architect - Associate | SAA-C03 Exam | Lambda Function ARNs

Lambda Function ARNs - Correct ARNs for a Lambda function

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Question

Which of the following are correct ARNs for a Lambda function? (choose 3 options)

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Explanations

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A. B. C. D. E.

Answer: A, B, D.

You can refer to this function using its Amazon Resource Name (ARN). There are two ARNs associated with this initial version: * Qualified ARN - The function ARN with the version suffix. a@ arn: aws: lambda: aws-region: acct-id:function:helloworld:$LATEST ° Unqualified ARN - The function ARN without the version suffix. You can use this unqualified ARN in all relevant operations. However, you cannot use it to create an alias. For more information, see Introduction to AWS Lambda Aliases. The unqualified ARN has its own resource policies. a@ arn: aws: lambda: aws-region:acct-id:function:helloworld Note Unless you choose to publish versions, the $LATEST function version is the only Lambda function version that you have. You can use either the qualified or unqualified ARN in your event source mapping to invoke the $LATEST version.

Sure, I'd be happy to help you out with this question!

An Amazon Resource Name (ARN) is a unique identifier that is used to identify and access AWS resources. In the case of Lambda functions, the ARN includes the function name, AWS region, AWS account ID, and version or alias (if applicable).

Let's look at the options one by one:

A. arn:aws:lambda:aws-region:acct-id:function:helloworld:$LATEST

This is a valid ARN for a Lambda function. The $LATEST refers to the latest version of the function code.

B. arn:aws:lambda:aws-region:acct-id:function:helloworld

This is also a valid ARN for a Lambda function. It refers to the specific version of the function, as no version or alias is specified.

C. arn:aws:lambda:aws-region:acct-id:function:helloworld/$LATEST

This is not a valid ARN for a Lambda function. The / character is not allowed in the function name.

D. arn:aws:lambda:aws-region:acct-id:function:helloworld:PROD

This is a valid ARN for a Lambda function, but it refers to a specific alias (in this case, PROD) of the function. If the function does not have an alias named PROD, then this ARN is not valid.

E. arn:aws:lambda:aws-region:acct-id:function:helloworld/1

This is not a valid ARN for a Lambda function. The / character is not allowed in the function name.

Therefore, the correct answers are A, B, and D.

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