AWS's managed relational database service. It supports MySQL, PostgreSQL, MariaDB, Oracle, SQL Server, and Amazon Aurora. AWS manages backups, patching, failover, and storage scaling.
On CLF-C02 this is the PaaS database example. SAA-C03 goes deeper into Multi-AZ (high availability), Read Replicas (read scaling), and Aurora. Question: relational database with automatic failover → RDS Multi-AZ.
RDS (Relational Database Service) is a concept that can show up on the exam. Check the full guide to see it in context.