单项选择题 ThesystemhangsatboottimeafterstartingNFSservices.Whatisthemostlikelycause？（）

单项选择题 An administrator is applying a corrective service to their HMC .The corrective service has been shipped on 3 DVDs. Which action will ensure the corrective service is correctly installed？（）

单项选择题 An administrator plans to use bootable AIX media to boot a system into maintenance mode. The system is running AIX 5.3 TL09 with a 64-bit kernel. The administrator has a selection of media available.  Which media should the administrator use？（）