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    PracticeAWS Solutions Architect Professional (SAP-C02)AWS Solutions Architect Professional SAP-C02 Practice Exam 4Question 19
    Hard1 markMultiple Choice
    Domain 1.3: Reliable ArchitecturesDynamoDBDisaster RecoveryServerlessRoute 53

    AWS SAP-C02 · Question 19 · Domain 1.3: Reliable Architectures

    A financial institution is building a highly resilient payment processing system. The system uses Amazon API Gateway, AWS Lambda, and Amazon DynamoDB. The architecture must survive a complete AWS Region failure with zero data loss (RPO = 0) and an RTO of less than 1 minute. Which combination of configurations will meet these requirements? (Select THREE)

    Answer options:

    A.

    Use Amazon DynamoDB Global Tables to replicate data across two regions.

    B.

    Configure Amazon Route 53 with a latency-based routing policy and health checks pointing to API Gateway in both regions.

    C.

    Implement strong consistency for DynamoDB reads and use DynamoDB Transactions for writes.

    D.

    Implement client-side retries with exponential backoff in the application.

    E.

    Use AWS Backup to take continuous backups of DynamoDB and restore in the second region.

    F.

    Deploy a Network Load Balancer in front of API Gateway for faster failover.

    How to approach this question

    Identify active-active components: Global Tables, Route 53 routing, and client resilience.

    Full Answer

    DynamoDB Global Tables provide multi-region replication. Route 53 latency routing with health checks enables active-active traffic distribution. Client-side retries handle transient failures during the brief failover window.

    Common mistakes

    Relying on AWS Backup for strict RTO requirements.
    Question 18All questionsQuestion 20

    Practice the full AWS Solutions Architect Professional SAP-C02 Practice Exam 4

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