Which process performs maintenance operations on the Tableau Server repository?

The process responsible for performing maintenance operations on the Tableau Server repository is Database Maintenance. This process includes a range of tasks aimed at ensuring the health and performance of the server's underlying database, which is crucial for the efficient operation of Tableau Server.

Database Maintenance tasks typically involve regular activities such as optimizing the database structure, reclaiming space, managing logs, and ensuring that data integrity is preserved. These operations are vital as they help maintain optimal performance levels, prevent data corruption, and facilitate smoother access to the repository by users. By performing these maintenance tasks, Database Maintenance plays a critical role in supporting the overall functionality and reliability of Tableau Server.

The other processes, such as Client File Service, Application Server, and Data Engine, have specific roles related to user requests, application functionality, and data processing, respectively, but do not focus on the maintenance of the repository itself. This delineation of responsibilities underlines why Database Maintenance is the correct choice for this question.