Answer:
Are all jobs of a DBMS (Database Management System).
Explanation:
DBMS or Database Management System is a software tool that is used to manage databases. Popular examples include MS SQL Server, Oracle and MySql. DBMSs can range from command line tools to fully featured programs.
DBMS's main job is to provide a interface for managing database, and also provide efficient and quick results of queries.
DBMSs also provide ways to connect your application to the database through APIs, so that a programmer can provide persistence to the application data.