You created an AWS Lambda function to process files uploaded to AWS S3 bucket. Lambda function started receiving requests and working properly. You have changed the code and uploaded new version of code to AWS Lambda function. What will happen to the requests sent right after the AWS lambda function update?

Answer options:

A.Requests will queue until the changes are fully propagated. You could experience up to 5 minutes of wait during this period.
B.Requests will be served by old version till you enable new version as latest.
C.When you have multiple versions of Lambda function, in the code you need to define which version of function to be used. Otherwise, requests would fail.
D.Requests might be served by old or new version for a brief period of less than one minute.

Answer: D
Option A is not a valid statement. It will not continually queue automatically or 5 minute wait time.
Option B is not correct. By default, whenever you update the code, it updates the LATEST version.
 
Option C is not correct. There is no need to define in code which version to be used. However, you can define which version to be used at the source which triggers Lambda function by providing version qualified ARN if you have published version.