A company uses Amazon RDS for a product database. The company wants to ensure the database is highly available. Which feature of Amazon RDS will meet this requirement?

Question

Options

• ARead replicas
• BBlue/green deployment
• CMulti-AZ deployment
• DReserved Instances

• B
  7% (1)
• C
  93% (13)

Explanation

Multi-AZ Deployment directly addresses high availability by automatically provisioning and maintaining a synchronous standby replica of your RDS instance in a different Availability Zone. If the primary instance fails, RDS automatically fails over to the standby with minimal downtime, ensuring the database remains accessible. Read replicas (A) are designed for scalability and read performance, not high availability - they use asynchronous replication and don't automatically take over if the primary fails. Blue/green deployments (B) are used for safer database updates and testing, not for maintaining uptime during failures. Reserved Instances (D) are simply a billing/cost optimization option that offer discounted pricing in exchange for a commitment period.

Memory Tip: Think "Multi-AZ = Multiple zones, Maximum Availability." Whenever you see "high availability" or "automatic failover" in an RDS question, immediately think Multi-AZ - it's the go-to answer for keeping databases alive during infrastructure failures.

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