Which attribute of a JFS filesystem can NOT be changed after the filesystem is created？（）

单项选择题A system administrator is attempting to unmount filesystem  dev data and receives the following message：   umount： 0506-349 Cannot unmount  dev data： The requested resource is busy.   Which of the following commands can be used to determine which process has open references within the filesystem？（）

A.lsfs
B.topas
C.fuser
D.mount

单项选择题Whichcommandwillincreasethecontiguousfreespaceofafilesystemwithouthavingtoaddadditionalpartitions？（）

A.chfs
B.fsck
C.chlv
D.defragfs

单项选择题Asystemadministratorhasincreasedthesizethelogicalvolumelv00.Theadministratornowwantstoenlargethefilesystem fs00thatismountedonlv00tothesamesizethatlv00currentlyis.Whichofthefollowingcommandswillshowtheadministratorthenumberofblockstousewhenincreasingthesizeofthefilesystem fs00？（）

A.lslv /fs00
B.lsfs -q /fs00
C.lsdev -Cc lv00
D.lsattr -El lv00

单项选择题The system administrator wants to use a new jfslog  dev fs1log with the filesystem  test fs1 on the testvg volume group. The following commands were used to create the log and assign it to the filesystem：  （1）mklv -t jfslog -y  dev fs1log testvg 1   （2）chfs -a log= dev fs1log  test fs1   While trying to mount the  test fs1 filesystem the administrator received the error：  Cannot mount  dev fs1lv on  test fs1： A system call received a parameter that is not valid . What step did the administrator miss that most likely caused the error？（）

A.Use the logform command to format /dev/fs1log as a jfslog
B.Use the chlv command to change the lv type of /dev/fs1log to jfslog
C.Use the chvg command to change the default jfslog of testvg to /dev/fs1log
D.Edit the /etc/filesystems file to change the log associated with /test/fs1 to /dev/fs1log

单项选择题Whileusingthesmitinstall_removemenustoremovesomefilesetsthesystemadministratornoticesthe usrfilesystemisnowunnecessarilylarge.Whichofthefollowingactionswillreducethesizeofthe usrfilesystem？（）

A.Backup， unmount， remove， recreate and restore the filesystem.
B.Boot from mksysb tape and select Shrink filesystems on restore.
C.Unmount， run defragfs /usr and the reducefs -size XXX /usr commands.
D.Update /etc/filesystems with the desired size for /usr and reboot the system.