What is the primary function of a database management system (DBMS)?

The primary function of a database management system (DBMS) is to provide controlled access to the database. This means that a DBMS manages how data is stored, organized, and retrieved while ensuring that only authorized users can access the data based on defined roles and permissions. This control is vital for maintaining data integrity, security, and privacy, allowing organizations to protect sensitive information and comply with regulations. Through features like user authentication, access control, and data encryption, a DBMS can restrict or allow access to different data sets, ensuring that only those with appropriate permissions can view or manipulate the data stored within the database.

The other options highlight functionalities that are either not primary or are counterproductive to the main purpose of a DBMS. For example, automatic data backups may be a feature, but they do not encompass the core function of controlled data access. Uncontrolled access would undermine data security and integrity, which is contrary to the purpose of a DBMS. While deleting outdated information can be part of database maintenance, it is not a primary function of the DBMS as a whole. Thus, the focus on controlled access underscores the essential role of a DBMS in modern data management practices.