Why was multiple database management systems used in your previous project?

Using multiple database management systems (DBMS) in a project can be driven by different requirements for data and its processing. For example:

• Relational DBMS (such as SQL Server) for storing structured data with transactions.
• NoSQL database (such as MongoDB) for storing unstructured or rapidly changing data.

This approach allows optimizing performance and scalability by leveraging the strengths of each DBMS for specific project tasks.