Which of the following are examples of a Relational Database Management System (RDBMS)?

The correct answer encompasses Oracle and SQL Server, both of which are widely recognized as examples of Relational Database Management Systems (RDBMS). These databases utilize a structured approach to manage data, employing tables to store information that can be linked through defined relationships. The hallmark of an RDBMS is its adherence to the principles of relational data modeling, which allows users to define, manipulate, and query data through structured query language (SQL).

Oracle is known for its robustness and scalability, making it suitable for large enterprise applications. SQL Server, developed by Microsoft, shares similar capabilities, catering to various business applications with high performance and reliability. Both systems enforce data integrity, support transactions, and provide tools for complex querying and reporting.

In contrast, other options listed contain databases that do not fit the RDBMS model. MySQL and PostgreSQL, while well-known RDBMS options, are not the selected answer here. MongoDB and Firebase represent NoSQL databases, focusing on unstructured data storage and non-relational data models. SQLite and Access, while also considered RDBMS, are typically used for smaller-scale applications and may not offer the extensive features associated with large, enterprise-level systems like Oracle and SQL Server.