Exam AWS Certified Developer - Associate DVA-C02 topic 1 question 70 discussion

Overrides let you pre-define the variation for selected users. to always receive the editable variation. https://aws.amazon.com/blogs/aws/cloudwatch-evidently/

Check Bullet point 9 in the link below https://docs.aws.amazon.com/AmazonCloudWatch/latest/monitoring/CloudWatch-Evidently-newfeature.html

An override allows you to force specific variations of a feature for a subset of users based on identifiers like user ID. This is useful for testing or debugging without affecting other users or the experiment as a whole.

Quote: To specify that certain users always see a certain variation, choose Overrides, Add override. Then, specify a user by entering their user ID, account ID, or some other identifier in Identifier, and specify which variation they should see. This can be useful for members of your own testing team or other internal users when you want to make sure they see a specific variation. The sessions of users who are assigned overrides do not contribute to launch or experiment metrics.

Therefore, option A is the best choice to meet the requirement of ensuring the engineer exclusively sees Variation A.

A is the correct answer.

By adding an override to the feature and setting the identifier to the engineer's user ID, the engineer ensures that only their requests are directed to Variation A. Setting the variation to Variation A explicitly assigns the desired variation to the engineer's requests, effectively ensuring they only experience Variation A. Therefore, the correct solution is Option A.

Set the variation to 0% or 100% makes no sense. Plus, the identifier should not be an account.

You have to give identifier