AWS Certified Solutions Architect Associate Test 4

Amazon RDS provides high availability and failover support for DB instances using Multi-AZdeployments. Multi-AZ deployments for Oracle, PostgreSQL, MySQL, and MariaDB DB instances useAmazon technology, while SQL Server DB instances use SQL Server Mirroring.
Reference:
http://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/Concepts.MultiAZ.html