单项选择题 Inaclusterusing/etc/hostsfornameresolution，whichofthefollowingdescribestheminimumrequirementsforthe/etc/hostsfile？（）

单项选择题 AnorganizationcurrentlyusesVeritasVolumeManager（VxVM）andisintegratingPowerHA.WhichofthefollowingdescribeshowPowerHAsupportsVeritasvolumegroups？（）

单项选择题 An administrator is planning a two node cluster containing Node1 and Node2 with a single resource groupnamed RG1. RG1 startup policy will be ’Online on Home Node only’. The home node is Node1. If RG1 fails over to Node2 itmust fall back to Node1. Fall back must take place outside of business hours. The agreed time for fall back is20：00. How will this be achieved with minimum action taken by administrator？（）