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- 单项选择题A system administrator needs to upgrade the Oracle database from Version 7 to Version 8. Which of the following scheduling concerns should be considered?（）
A、Schedule enough down time to backup, upgrade and reboot.
B、Backup, upgrade, then schedule enough down time to reboot the system.
C、Backup, then schedule enough down time to upgrade and reboot the system.
D、There are no scheduling concerns because no down time is required.
- A
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