← Google Cloud Professional Cloud Architect (PCA)

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A retail company is migrating its e-commerce platform to Google Cloud. The business requires 99.99% availability during peak shopping seasons and must ensure that a regional outage does not impact customer transactions. Which architecture best meets these requirements?

Deploy the application across multiple regions using Cloud Spanner as the database and a global HTTP(S) Load Balancer to route traffic. Deploy the application in a single region across multiple zones using Cloud SQL with automatic failover replicas. Deploy the application in a single region using Cloud SQL with cross-region read replicas and promote them manually during an outage. Deploy the application in a primary Google Cloud region and maintain an on-premises data center as a warm standby for regional failover.

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