ExpertHard1 markMultiple Choice
Domain 1: Designing and Planning a Cloud Solution ArchitectureDomain 1Migration StrategyStrangler FigMicroservices
GCP PCA · Question 31 · Domain 1: Designing and Planning a Cloud Solution Architecture
Your enterprise is migrating a massive, monolithic legacy application to Google Cloud. The business cannot tolerate a multi-year 'big bang' migration where the new system is built in secret and swapped overnight. They want to migrate functionality piece by piece to microservices on GKE while the legacy system continues to run. Which architectural pattern should you adopt?
Your enterprise is migrating a massive, monolithic legacy application to Google Cloud. The business cannot tolerate a multi-year 'big bang' migration where the new system is built in secret and swapped overnight. They want to migrate functionality piece by piece to microservices on GKE while the legacy system continues to run. Which architectural pattern should you adopt?
Answer options:
A.
Lift and Shift Pattern.
B.
Strangler Fig Pattern.
C.
Blue/Green Deployment.
D.
Circuit Breaker Pattern.
How to approach this question
Identify the scenario: migrating a monolith to microservices gradually. The Strangler Fig pattern is the industry standard term for this.
Full Answer
B.Strangler Fig Pattern.✓ Correct
Strangler Fig Pattern.
The Strangler Fig pattern is a popular modernization strategy. You put an API Gateway or Load Balancer in front of the legacy app. You build a new microservice (e.g., 'User Profile'). You update the router to send `/profile` traffic to the new microservice, while all other traffic goes to the monolith. You repeat this until the monolith is gone. This minimizes risk compared to a 'big bang' rewrite.
Common mistakes
Confusing deployment strategies (Blue/Green) with architectural migration patterns.
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