Which feature of a database management system allows for easy updates of contact names?

The feature of a database management system that allows for easy updates of contact names is updating files. This aspect of database management is fundamental because it directly pertains to how records within the database are edited and managed. Updating files enables users to modify existing information, such as contact names, swiftly and efficiently without the need to create new records. This is essential for maintaining current and accurate information in any database.

Other options, while important to database management, do not specifically address the ease with which contact names can be updated. For example, search functionality relates to the ability to find data but does not facilitate changing that data. Data security focuses on protecting information from unauthorized access or tampering, ensuring that changes are made only by authorized users. A backup system is crucial for data recovery purposes, ensuring that data can be restored in the event of loss but does not play a direct role in the real-time updating of records. Thus, updating files is the feature that directly supports the updating of contact names.