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Function Versioning and Aliases

5 minutes 5 Questions

Function Versioning and Aliases are concepts in AWS Lambda that provide additional control over your application's deployment and rollback process. A version is an immutable snapshot of the Lambda function code and its configuration, including the runtime, memory size, and environment variables. Ea…

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AWS Certified Solutions Architect - Function Versioning and Aliases Example Questions

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Question 1

You have a Lambda function that is responsible for generating reports, and you have created multiple versions of this function. Your team has asked you to create an alias for an older version of the function for debugging purposes, but also maintain the current alias for the latest version. Which of the following actions should you perform?

Correct Answer: Create an additional alias pointing to the required older version of the function.

Aliases provide a way to manage multiple versions of a Lambda function with a single alias. You can create multiple aliases for different versions of the function. By creating an additional alias for the older version, you can maintain the existing alias for the latest version while allowing the debugging team to use the newly created alias.

Question 2

Your company is using AWS Lambda, and you have set up multiple function versions and aliases for staging, production, and development environments. However, you now need to restrict certain IAM principals to only invoke specific versions or aliases. What should you do?

Correct Answer: Apply an IAM policy with a Condition statement restricting access to the specific versions or aliases.

You can restrict access to specific versions or aliases of a Lambda function using IAM policies with a Condition statement that includes a qualifier, such as the alias or version resource. This ensures that only the specified IAM principals can access the specified versions or aliases in the policy.

Question 3

You have created a function with multiple versions and assigned aliases for the development, test, and production environments. How do you ensure that the development environment points to the latest version when publishing a new function version?

Correct Answer: Update the development alias to point to the latest version.

To ensure the development environment points to the latest version, after publishing a new version, update the development alias to point to this new version. This way, your development environment's alias always points to the latest changes made to the function.

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