Explanation/Reference:
Explanation:
Members of the mdw_reader role have Read access to the management data warehouse. Because the purpose of this role is to support troubleshooting by providing access to historical data, members of this role cannot view other elements of the management data warehouse schema.
Note: The Server Activity data collection set collects information about resources used by the SQL Server instance (processor, memory, disk I/O, and network usage), SQL Server instance activity (batch requests, logouts, SQL compilations and recompilations, transactions, user connections, and logins) and waits Incorrect:
Members of the mdw_admin role have Read, Write, Update, and Delete access to the management data warehouse.
Members of this role can perform the following operations:
Change the management data warehouse schema when required (for example, adding a new table

when a new collection type is installed).
Run maintenance jobs on the management data warehouse, such as archive or cleanup.
