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单项选择题For security reasons， an administrator is asked to modify the system to prevent someone from leaving a terminal logged in. To enable a five minute timeout for all users， what would need to be done to accomplish this task？（）

A.Add the following line to /etc/environment： TMOUT=300
B.Add the following lines to /.profile TMOUT=5 export TMOUT
C.Execute the following command： chuser -u ALL -a TIMEOUT=5M
D.Execute the following command： chsec -u ALL -a TIMEOUT=600

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1.单项选择题Which action changes the default editor for ALL users on the system from vi to edit of the following？（）

A.Issue the command： export EDITOR=/usr/bin/edit
B.Modify /.profile and change the EDITOR variable to /usr/bin/edit
C.Modify /etc/environment and add EDITOR=/usr/bin/edit export EDITOR
D.Modify /etc/security/defaults and change the EDITOR value to /usr/bin/edit

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2.单项选择题How does a system administrator add a new user to a system？（）

A.mkuser
B.cruser
C.adduser
D.edit /etc/password

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3.单项选择题A user wants to be permanently added to the dba group. Which command or process can be used to accomplish this？（）

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

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4.单项选择题Due to operational commitments， a system has a very short backup window during the week， but is not used from Saturday morning through Sunday at Midnight. Which of the following minimizes backup time， while providing the best data restore coverage？（）

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

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5.单项选择题A system administrator performs a full backup every Saturday evening and incremental backups the rest of the week. The system failed on Thursday and needs to be restored. Which backup tapes will be required to restore the system to its most recent recoverable state？（）

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

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6.单项选择题A system administrator used the savevg command to back up the testvg each night. There is now a requirement to exclude the /test/static filesystem from the backup. How can this be accomplished？（）

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

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7.单项选择题How can a directory be excluded from a mksysb backup of the following？（）

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

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8.单项选择题Which command can a system administrator use to verify that a tape is in backup format and is readable by the system？（）

A.tar
B.tctl
C.tcopy
D.restore

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9.单项选择题In which directory are the basic Linux commands such as gzip， gunzip and zcat installed？（）

A./opt/freeware/bin
B./usr/bin/freeware
C./var/freeware/bin
D./usr/sbin/freeware

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10.单项选择题A system administrator has an application that has the data in volume group appvg. Which of the following commands will back up the contents of appvg to the tape in /dev/rmt0 and check for any read errors？（）

A.savevg -mf /dev/rmt0 appvg
B.savevg -cvf /dev/rmt0 appvg
C.savevg -xvf /dev/rmt0 appvg
D.savevg -f /dev/rmt0 -V appvg

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