A company must deploy a PostgreSQL database on Amazon RDS and ensure it is highly available and fault tolerant. Which RDS deployment option should they choose?
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Correct answer: Amazon RDS with multiple Availability Zones.
Why this is the answer
Deploying Amazon RDS with multiple Availability Zones (Multi-AZ) is the correct choice for high availability and fault tolerance. Multi-AZ creates a synchronous standby replica of your database in a different Availability Zone. If the primary database instance fails, RDS automatically switches to the standby replica, minimizing downtime and ensuring business continuity. This protects against infrastructure failures within a single AZ. A single Availability Zone deployment does not provide fault tolerance against AZ-wide outages. Amazon RDS snapshots are used for backup and recovery, not for continuous high availability. AWS Database Migration Service (AWS DMS) is a tool for migrating databases, not a deployment option for high availability.
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