AWS Certified Developer Associate DVA-C02 Practice Question
A team of developers manages a web service endpoint interfacing with a mobile application. They need to roll out a new feature which adjusts the data format returned to clients. To prevent potential disruptions to the live mobile application, what strategy should they employ for introducing this new feature to end-users?
Initiate a staged rollout by gradually increasing the new feature exposure to a fraction of live traffic before full deployment.
Conduct thorough testing in an isolated clone of the production environment before updating the live service.
Merge the changes directly into the production environment during low-traffic periods to evaluate real user interactions without notice.
Create a new, identically named environment and quickly switch all user traffic to this updated version to minimize downtime.
A canary release approach involves directing a small amount of live traffic to the new feature to monitor its impact and performance before making it generally available to all users. This method is preferred for services like web and mobile application backends since it reduces the risk of disruptions if unexpected issues arise. Creating a new stage with the same name or applying changes directly to the existing production environment could potentially disrupt all users if there are issues with the update. While functional testing in an isolated environment is an important step, it does not provide a mechanism for gradual exposure to the live user base.
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AWS Certified Developer Associate DVA-C02
Deployment
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