A company is writing a Lambda function that will run in multiple stages, such a dev, test, and production. The function is dependent upon several external services, and it must call different endpoints for these services based on the function’s deployment stage.
What Lambda feature will enable the developer to ensure that the code references the correct endpoints when running in each stage?

Answer options:

A.Tagging
B.Concurrency
C.Aliases
D.Environment variables

Answer – D
You can create different environment variables in the Lambda function that can be used to point to the different services. The below screenshot from the AWS Documentation shows how this can be done with databases.
Option A is invalid since this can only be used to add metadata for the function.
Option B is invalid since this is used for managing the concurrency of execution.
Option C is invalid since this is used for managing the different versions of your Lambda function.
For more information on AWS Lambda environment variables, please refer to the below Link-
https://docs.aws.amazon.com/lambda/latest/dg/env_variables.html