CompTIA认证考试LX0-101章节练习(2019.03.01)

单项选择题
You ran out of space and added a eighth disk to your SCSI-1 system. When you try to start， the system no longer boots. What is most likely the cause of this problem？（）
A. SCSI-1 supports only 8 devices including the adaptor.
B. SCSI-1 supports only 6 disks per adaptor.
C. There is a SCSI-ID conflict that causes that problem.
D. You forgot to set the SCSI-ID #8 for the new disk.
单项选择题
Which system administration command you can use to update Id.so.cache after the installation of new shared libraries？（）
A. Idconfig
B. Idd
C. libpath
D. newlibs
单项选择题
Which of the following commands makes /bin/foo executable by everyone but writable only by its owner？（）
A. chmod 557 /bin/foo
B. chmod o+rwx.a+rx/bin/foo
C. chown 557 /bin/foo
D. chmod 755/bin/foo
单项选择题
To allow a regular user account to mount and unmount a filesystem （for instance， a cdrom or floppy）， which option need to be added to the corresponding line in /etc/fstab？（）
A. nouidchk
B. alluser
C. user
D. auto
单项选择题
What command will print a list of usernames （first column） and their corresponding user id （uid， third column） from /etc/passwd？（）
A. cut -d： -f 1，3 /etc/passwd
B. chop -c 1，3 /etc/passwd
C. tac 1-3/etc/passwd
D. fmt -u /etc/passwd
填空题
USB fax/modems that conform to this subclass of the Communication Device Class （CDC） vendor neutral standard are Linux compatible （answer is a 3 letter acronym）.（）
答案：ACM(ABSTRACTCONTROLMODEL)
填空题
Which program finds only files that are in your PATH？（）
答案：/USR/BINyWHICH
单项选择题
What is the difference between thE.remove and thE.purge action with the dpkg command？（）
A. -remove removes the program， -purge also removes the config files
B. -remove only removes the program， -purge only removes the config files
C. -remove removes a package， -purge also removes all packages dependent on it
D. -remove removes only the package file itself， -purge removes all files related to the package
单项选择题
Using vi， you want to save changes to the file myfile with ：w!， but vi complains it cannot write to the file. Therefore， you want to check the write permissions on the file. To do this without leaving vi， you type：（）
A. ：!ls-I myfile
B. ：\ls-l myfile
C. esc ：Is -I myfile
D. ：？ls-l myfile
单项选择题
Which Debian package system command will list all partially installed packages and suggest how to get them correctly installed？（）
A. dpkg-G
B. apt-get-u
C. dpkg-Dh
D. dpkg-l
E. apt-get-y