单项选择题 The Database Resource Manager is automatically enabled in the maintenance window that runs the Automated Maintenance Task. What is the reason for this?（）

单项选择题 You executed the following commands: Which statement is correct regarding the above statistics collection on the SH.CUSTOMERS table in the above session?（）

多项选择题 You want to enable resumable space allocation at the instance level.Which two actions would enable resumable space allocation at the instance level?（）