LFCS Online Practice Questions and Answers
Which of the following commands moves and resumes in the background the last stopped shell job?
A. run
B. bg
C. fg
D. back
In which directory must definition files be placed to add additional repositories to yum?
A. /etc/yum.repos.d, /etc/yum.repos.d/, yum.repos.d, yum.repos.d/
Which of the following IPv4 networks are reserved by IANA for private address assignment and private routing? (Choose THREE correct answers.)
A. 127.0.0.0/8
B. 10.0.0.0/8
C. 169.255.0.0/16
D. 172.16.0.0/12
E. 192.168.0.0/16
Which environment variable should be set in order to change the time zone for the commands run from within the environment variable's scope? (Specify the variable name only.)
A. TZ
Which keyword must be listed in the hosts option of the Name Service Switch configuration file in order to make host lookups consult the /etc/hosts file?
A. files
What is the difference between the i and a commands of the vi editor?
A. i (interactive) requires the user to explicitly switch between vi modes whereas a (automatic) switches modes automatically.
B. i (insert) inserts text before the current cursor position whereas a (append) inserts text after the cursor.
C. i (independent rows) starts every new line at the first character whereas a (aligned rows) keeps the indentation of the previous line.
D. i (interrupt) temporarily suspends editing of a file to the background whereas a (abort) terminates editing.
How many fields are in a syntactically correct line of /etc/fstab?
A. 3
B. 4
C. 5
D. 6
E. 7
Which command displays a list of allbackground tasks running in the current shell? (Specify ONLY the command without any path or parameters.)
A. jobs
Which file should be edited to select the network locations from which Debian installation package files are loaded?
A. /etc/dpkg/dpkg.cfg
B. /etc/apt/apt.conf
C. /etc/apt/apt.conf.d
D. /etc/apt/sources.list
E. /etc/dpkg/dselect.cfg
Which port is the default server port for the HTTPS protocol? (Specify the port number using digits.)
A. 443