A company is designing a highly resilient, multi-region architecture for a critical payment processing system. They need to ensure zero data loss (RPO=0) and automated failover. Which FOUR strategies should be implemented? (Select FOUR)

Answer options:

Use Amazon Aurora Global Database for cross-region data replication.

Implement Amazon DynamoDB Global Tables for session state.

Use Route 53 with health checks and failover routing.

Implement idempotency in the payment processing logic.

Use AWS Snowball to backup data daily.

Rely on manual DNS changes for failover.

How to approach this question

Select the four components of a resilient multi-region architecture.

Full Answer

Use Amazon Aurora Global Database for cross-region data replication., Implement Amazon DynamoDB Global Tables for session state., Use Route 53 with health checks and failover routing., Implement idempotency in the payment processing logic.

A robust multi-region architecture requires data replication (Aurora/DynamoDB), automated traffic routing (Route 53), and application-level resilience (idempotency) to handle retries safely.

Common mistakes

Forgetting application-level idempotency in payment systems.

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