A company requires an RPO of 2 hours and an RTO of 10 minutes for its data and application at all times. An application uses a MySQL database and Amazon EC2 web servers. The development team needs a…

Question

Options

• ACreate an Amazon Aurora cluster in one Availability Zone across multiple Regions as the data store.
• BCreate an Amazon Aurora global database in two Regions as the data store. In the event of a failure,
• CCreate an Amazon Aurora multi-master cluster across multiple Regions as the data store. Use a
• DSet up the application in two Regions and use Amazon Route 53 failover-based routing that points to
• ESet up the application in two Regions and use a multi-Region Auto Scaling group behind Application

• A
  11% (4)
• B
  66% (23)
• C
  6% (2)
• E
  17% (6)

Explanation

Explanation

Why B and D are Correct: Option B (Aurora Global Database) satisfies the 2-hour RPO because it replicates data across Regions with sub-second latency, and can promote a secondary Region to primary in under 1 minute, meeting the 10-minute RTO. Option D (Route 53 failover routing) ensures the application layer automatically redirects traffic to the healthy Region when a failure is detected, completing the full-stack disaster recovery solution within the RTO window.

Why the Distractors Are Wrong:

• Option A is incorrect because Aurora clusters within a single Availability Zone lack cross-Region redundancy, failing to meet disaster recovery requirements.
• Option C is partially misleading - Aurora multi-master does exist but is limited to a single Region, not across multiple Regions, making it insufficient for regional disaster recovery.
• Option E is incorrect because a multi-Region Auto Scaling group is not a native AWS construct; Auto Scaling groups are Region-specific, making this architecturally invalid.

Memory Tip: Think "Global DB + Smart DNS" - Aurora Global Database protects your data across Regions (RPO), while Route 53 failover routing protects your application traffic (RTO). Together, they form a complete DR strategy: data layer + routing layer = full resilience.

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