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 After mirroring rootvg， a system administrator wants to validate that the system will boot correctly. Which of the following tasks must be performed before changing the boot order？（）

单项选择题 Theadministratorcreatedanentryintheinittabforrunlevel2.Thesystemwasalreadybootedinnormalmode.Whichwillstartthenewlycreatedentry？（）