SAP-C02 Q240 · DR

Question

A solutions architect needs to define a reference architecture for a solution for three-tier applications with web. application, and NoSQL data layers. The reference architecture must meet the following requirements: • High availability within an AWS Region • Able to fail over in 1 minute to another AWS Region for disaster recovery • Provide the most efficient solution while minimizing the impact on the user experience Which combination of steps will meet these requirements? (Choose three)

Accepted Answer

This question has three requirements: (1) High availability within a Region, (2) Failover in 1 minute to another Region, and (3) Most efficient solution with minimal user impact.

**B — Route 53 Failover Routing with 30s TTL:**
- Failover routing policy automatically detects primary Region health check failures and redirects traffic to the DR Region.
- TTL of 30 seconds ensures DNS resolvers refresh quickly. When the primary fails, clients will get the DR Region's IP within ~30 seconds, satisfying the 1-minute failover requirement.
- This is purpose-built for active-passive DR scenarios.

**C — DynamoDB Global Tables:**
- Global Tables provide **active-active, multi-Region replication** with single-digit millisecond latency for writes.
- Data is automatically and continuously replicated ac

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