30.Which two statements are true with respect to the maintenance window? (Choose two.)

对于维护窗口，哪两个陈述是正确的?

A. A DBA canenable or disable an individual task in all maintenance windows.

DBA可以启用或禁用一个单独的任务在所有的维护窗口。

B. A DBAcannot change the duration of the maintenance window after it is created.

C. In caSEOf a long maintenance window,all Automated Maintenance Tasks are restartedevery four

hours.

D. A DBA cancontrol the percentage of the resource allocated to the Automated MaintenanceTasks in each window.

DBA可以控制资源的比例分配给每个窗口的自动维护任务。

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