Linux Foundation LFCS 問題集

質問 1：
What is the difference between the commands test -e path and test -f path?
A. The -f option tests for a regular file. The -e option tests for an executable file.
B. The -f option tests for a regular file. The -e option tests for an empty file.
C. They are equivalent options with the same behaviour.
D. Both options check the existence of the path. The -f option also confirms that it is a regular file.
正解：D

質問 2：
Which of the following file permissions belong to a symbolic link?
A. +rwxrwxrwx
B. srwxrwxrwx
C. lrwxrwxrwx
D. -rwxrwxrwx
正解：C

質問 3：
Which configuration file would be edited to change the default options for outbound SSH sessions?
A. /etc/ssh/sshd_config
B. /etc/ssh/ssh
C. /etc/ssh/ssh_client
D. /etc/ssh/client
E. /etc/ssh/ssh_config
正解：E

質問 4：
Which shell command is used to continue background execution of a suspended command?
A. &
B. :&
C. cont
D. bg
E. exec
正解：D

質問 5：
Which of the following may occur as a consequence of using the command ifconfig? (Choose THREE correct answers.)
A. Network interfaces may become active or inactive.
B. The system's host name may change.
C. The routing table may change.
D. New name servers may be added to the resolver configuration.
E. IP addresses may change.
正解：A,C,E

質問 6：
What is NOT contained in the locale setting of the operating system?
A. thousands separator
B. language
C. timezone
D. currency symbol
正解：C

質問 7：
Which grep command will print only the lines that do not end with a / in the file foo?
A. grep '/#' foo
B. grep '/$' foo
C. grep -v '/$' foo
D. grep -v '/#' foo
正解：C