Which AWS service is a relational database compatible with MySQL and PostgreSQL?
Amazon Redshift
Amazon DynamoDB
Amazon Aurora
Amazon Neptune
Explanations:
Amazon Redshift is a data warehouse solution, primarily used for analytical queries, not as a relational database.
Amazon DynamoDB is a NoSQL database service, not a relational database compatible with MySQL or PostgreSQL.
Amazon Aurora is a relational database service compatible with both MySQL and PostgreSQL.
Amazon Neptune is a graph database service, not a relational database compatible with MySQL or PostgreSQL.