How does a system administrator add a new user to a system？（）

单项选择题Auserwantstobepermanentlyaddedtothedbagroup.Whichcommandorprocesscanbeusedtoaccomplishthis？（）

A.chgrp
B.chuser
C.setgroups
D.edit /etc/security/group

单项选择题Duetooperationalcommitments，asystemhasaveryshortbackupwindowduringtheweek，butisnotusedfromSaturdaymorningthroughSundayatMidnight.Whichofthefollowingminimizesbackuptime，whileprovidingthebestdatarestorecoverage？（）

A.Full backups every night
B.Differential backups every night
C.Full backup Saturday night， incremental backups the rest of the week
D.Full backup Saturday night， differential backups the rest of the week

单项选择题AsystemadministratorperformsafullbackupeverySaturdayeveningandincrementalbackupstherestoftheweek.ThesystemfailedonThursdayandneedstoberestored.Whichbackuptapeswillberequiredtorestorethesystemtoitsmostrecentrecoverablestate？（）

A.Saturday’s full backup tape only
B.Wednesday’s incremental backup tape only
C.Saturday’s full backup and Wednesday’s incremental backup tapes
D.Saturday’s full backup and Sunday’s through Wednesday’s incremental backup tapes

单项选择题Asystemadministratorusedthesavevgcommandtobackupthetestvgeachnight.Thereisnowarequirementtoexcludethe test staticfilesystemfromthebackup.Howcanthisbeaccomplished？（）

A.Use the -X flag on the savevg command
B.Put an entry in the /etc/exclude.testvg file
C.Remove the /test/static entries from the /vgdata/testvg.data file
D.Use the touch command to create /test/static/.exclude before using savevg

单项选择题Howcanadirectorybeexcludedfromamksysbbackupofthefollowing？（）

A.Put an entry in the /etc/exclude.rootvg file
B.Put an entry in the /etc/mksysb.exclude file
C.Remove the directory’s entry from the mksysb /image.data file
D.Remove the directory’s entry from the /var/adm/ras/bosinst.data file