Which database engine is compatible with Amazon RDS?
Apache Cassandra
MongoDB
Neo4j
PostgreSQL
Explanations:
Apache Cassandra is not supported by Amazon RDS; Amazon offers Amazon Keyspaces for Cassandra.
MongoDB is not supported by Amazon RDS; Amazon DocumentDB is available for MongoDB compatibility.
Neo4j is not supported by Amazon RDS; Amazon Neptune is a service for graph databases.
PostgreSQL is supported by Amazon RDS as a fully managed database engine.