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AWS Certified Developer - Associate · AWS
Select one answer.
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Rolling deployments reuse existing instances for a portion of the deployment time. While new instances are launched, old ones continue to serve traffic. This minimizes idle compute time and reduces costs.
D is the correct answer.
Ans-B: The immutable deployment method updates an application by launching new instances with the new version in a new Auto Scaling group, alongside the existing instances running the old version. This ensures that the application maintains full capacity during the deployment because the existing environment is unaffected until the new environment is fully deployed and verified. Once the deployment is successful, traffic is shifted to the new instances, and the old ones are terminated. This minimizes downtime and provides a quick rollback if needed. The cost of additional resources is limited to the duration of the deployment, after which the old resources are terminated.