A team is migrating a monolithic application to microservices on Amazon ECS. They need a deployment strategy that allows them to test the new microservices in production with real traffic, but without affecting the end-user experience. Which pattern should they use?

Answer options:

Blue/Green Deployment

Canary Deployment

Traffic Shadowing (Dark Launch)

A/B Testing

How to approach this question

Identify the pattern that uses real traffic but hides the response from the user.

Full Answer

C.Traffic Shadowing (Dark Launch)✓ Correct

Traffic Shadowing (Dark Launch)

Traffic Shadowing duplicates incoming requests and sends them to the new service for testing, but only the response from the old service is returned to the user.

Common mistakes

Confusing Shadowing with Canary.

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Practice the full AWS Solutions Architect Professional SAP-C02 Practice Exam 6

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