Which Amazon RDS feature can be used to achieve high availability?
Amazon RDS provides high availability and failover support for DB instances using Multi-AZ deployments. Amazon RDS uses several different technologies to provide failover support. Multi-AZ deployments for Oracle, PostgreSQL, MySQL, and MariaDB DB instances use Amazon's failover technology. SQL Server DB instances use SQL Server Database Mirroring (DBM).https://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/Concepts.MultiAZ.html