Which AWS service provides managed relational databases supporting MySQL, PostgreSQL, Oracle, and SQL Server?
A.Amazon DynamoDB
DynamoDB is NoSQL, not relational.
B.Amazon RDS
Correct. RDS is the managed relational service.
C.Amazon ElastiCache
ElastiCache is in-memory caching, not a relational store.
D.Amazon DocumentDB
DocumentDB is a MongoDB-compatible document store.
Why this answer
Amazon RDS is the managed relational database service supporting six engines (MySQL, PostgreSQL, MariaDB, Oracle, SQL Server, Aurora-compatible). DynamoDB/DocumentDB are NoSQL; ElastiCache is in-memory caching.
Correct answer: B · Last reviewed 2026-10-26
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