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DOP-C02 · Question #371

DOP-C02 Question #371: Real Exam Question with Answer & Explanation

The correct answer is D: Blue-Green. AWS specifically recommends Blue-Green for super-fast, zero-downtime deploys - and thus rollbacks, which are redeploying old code. You use various strategies to migrate the traffic from your current application stack (blue) to a new version of the application (green). This is a p

Submitted by stefanr· Mar 6, 2026Reliability & Resilience

Question

Which of these techniques enables the fastest possible rollback times in the event of a failed deployment?

Options

  • ARolling; Immutable
  • BRolling; Mutable
  • CCanary or A/B
  • DBlue-Green

Explanation

AWS specifically recommends Blue-Green for super-fast, zero-downtime deploys - and thus rollbacks, which are redeploying old code. You use various strategies to migrate the traffic from your current application stack (blue) to a new version of the application (green). This is a popular technique for deploying applications with zero downtime. https://d0.awsstatic.com/whitepapers/overview-of-deployment-options-onaws.pdf

Topics

#Deployment strategies#Blue-Green deployment#Rollback#Immutable infrastructure

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