（270）Which tasks are run automatically as part of the Automated Maintenance Task by default? (Choose all that apply.)

A. Segment Advisor

B. SQL Access Advisor

C. Optimizer statistics gathering

D. Automatic SQL Tuning Advisor

E. Automatic Database Diagnostics Monitor

答案：（A、C、D）

点击配置后，可见这三个任务默认都是启用的，当然也可以自动配置。