CompTIA LX0-101 問題集

質問 1：
In the vi editor, which of the following commands will delete the current line at the cursor and the 16 lines following it (17 lines total)?
A. d17d
B. 17d
C. 17dd
D. 17x
E. 16d
正解：C

質問 2：
In bash, inserting 1>&2 after a command redirects:
A. standard output to standard error.
B. standard error to standard input.
C. standard output to standard input.
D. standard error to standard output.
E. standard input to standard error.
正解：A

質問 3：
CORRECT TEXT
What command with all options and/or parameters will send the signal USR1 to any executing process of program apache2?
正解：
killall -s SIGUSR1 apache2, killall -s USR1 apache2,killall -SIGUSR1 apache2,killall USR1 apache2

質問 4：
Many people like the vi text editor but the default bash command line editor recognizes emacs keystrokes. Which of the following commands, entered into a bash initialization file, will have bash recognize vi keystrokes after login?
A. set -o vi
B. history -p vi
C. alias emacs=vi
D. unset emacs
E. HISTCMD=vi
正解：A

質問 5：
In the command foo < bar | foobar, which of the following statements is correct?
A. The command bar receives its stdin from the contents of the file foobar.
B. The command foobar receives its stdin from the stdout of foo.
C. The stdout from the command foobar is saved to the file foo.
D. The stdout from the command foo is saved to the file foobar.
E. The command foobar receives its stdin from the stderr of foo.
正解：B

質問 6：
CORRECT TEXT
The priority of any process can range from -20 to ________. (Provide only the numerical value).
正解：
+19,19

質問 7：
CORRECT TEXT
An administrator wants to display all currently mounted file systems. Which command would be used? (Please enter only a single command without arguments or options).
正解：
/bin/df,/bin/mount,df,mount

質問 8：
CORRECT TEXT
An administrator has downloaded an image file of a boot floppy disk to a hard drive. What is the BEST utility to create a boot floppy from the disk image? (Specify a single command without options.)
正解：
/bin/dd,dd

質問 9：
Which of the following commands will uninstall a package but leave its configuration files in case a package is re-installed?
A. dpkg -s pkgname
B. dpkg -L pkgname
C. None, no command will do this.
D. dpkg -P pkgname
E. dpkg -r pkgname
正解：E