A developer needs to update a Lambda function that processes user-uploaded photos and test the update by splitting user traffic between the current function and the new version. Which combination of steps accomplishes this? (Choose two.)

To implement traffic splitting for a Lambda function, you first need distinct versions. Publishing an immutable version of the current Lambda function creates a snapshot of its code and configuration. Then, modifying the function code and publishing it as a new version provides the second distinct version required for traffic splitting. Once you have two versions, an alias can be created. This alias is configured as a weighted alias, allowing you to specify the percentage of traffic directed to each published version. This enables controlled, gradual rollout of the new function. Incorrect options: AWS CodeBuild is a build service, not directly used for traffic shifting in Lambda. Function URLs are for invoking a single function version or alias, not for managing traffic splitting between multiple versions. An alias points to Lambda versions, not directly to function URLs for traffic splitting.