AWS Certified Developer Associate DVA-C02 Practice Question
A company needs to update its web application running on AWS without disrupting the user experience. Which deployment strategy should they employ to ensure that only a portion of users are directed to the new version initially, thereby allowing for performance and stability monitoring before the new version is fully deployed?
The correct answer is a canary deployment strategy. A canary deployment involves deploying the new version of an application to a small subset of users before fully rolling it out. This allows developers to monitor the performance and stability of the application with live traffic and reduce the risk of introducing issues that could affect all users. In contrast, blue/green deployment swaps the entire environment at once, which doesn't meet the requirement for gradual exposure. A rolling deployment uniformly updates instances but again, does not support the feature of selective traffic routing as described. All-at-once deployment doesn't allow for gradual exposure, as it updates all instances simultaneously.
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AWS Certified Developer Associate DVA-C02
Deployment
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