单项选择题 A system has two configured fibre channel cards, one of which, fsc0, has failed and must be replaced. Which command should an administrator use to remove the card device and attached child devices?（）

单项选择题 An administrator has added hdisk2 to rootvg and would like to create a boot logical volume on the disk soit can be used as theprimary boot partition on the next reboot. Which command should the administrator use?（）

单项选择题 Which key should be pressed on an ASCII terminalduring the system initialization to force the system to read from the default bootlist?（）