AWS Certified Cloud Practitioner (CLF-C02) — Question 583

A company needs to deploy a PostgreSQL database into Amazon RDS. The database must be highly available and fault tolerant.

Which AWS solution should the company use to meet these requirements?

Answer options

• A. Amazon RDS with a single Availability Zone
• B. Amazon RDS snapshots
• C. Amazon RDS with multiple Availability Zones
• D. AWS Database Migration Service (AWS DMS)

Correct answer: C

Explanation

Amazon RDS Multi-AZ deployments provide high availability and automatic failover support by synchronously replicating data to a standby instance in a different Availability Zone. Single-AZ deployments lack this redundancy, snapshots are used for backup recovery rather than real-time fault tolerance, and AWS DMS is a migration tool rather than a database hosting solution.