You are hosting a mission-critical database on Amazon Aurora. To ensure high availability with the lowest possible RTO across three Availability Zones, what is the minimum number of Aurora replicas you should have?

Direct Answer (Verified)Reviewed by Sunny (Senior Cloud Engineer)

Correct Answer: 2 replicas (one in each of the three zones including the primary)

Aurora distributes data across three AZs. Having at least two replicas (for a total of three instances) ensures that an instance is available in every AZ for near-instant failover....

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Real Exam ScenarioAmazon RDS

You are hosting a mission-critical database on Amazon Aurora. To ensure high availability with the lowest possible RTO across three Availability Zones, what is the minimum number of Aurora replicas you should have?

✓ Correct Answer & ExplanationAmazon RDS

Correct Answer

2 replicas (one in each of the three zones including the primary)

Why This Answer Is Correct

Aurora distributes data across three AZs. Having at least two replicas (for a total of three instances) ensures that an instance is available in every AZ for near-instant failover.

📚 What This Question Tests

This question evaluates your knowledge of Amazon RDS — a core concept tested in AWS Certified Solutions Architect – Professional (SAP-C02). Understanding Amazon RDS is essential for designing scalable, secure, and cost-effective cloud architectures. Mastery of this topic will help you answer scenario-based questions confidently on exam day.