Free Practice Questions for Linux Foundation LFCS Exam

Question 1

Which command will disable swapping on a device? (Specify ONLY the command without any path or parameters.)

Aswapoff, /sbin/swapoff

Correct Answer: A. swapoff, /sbin/swapoff

Question 2

Which of the following are requirements in order to run a shell script like a regular command from anywhere in the filesystem? (Choose THREE correct answers.)

AThe user issuing the command must be in the group script.

BThe script file must be found in the $PATH.

CThe script file must have the executable permission bit set.

DThe script must begin with a shebang-line (#!) that points to the correct interpreter.

EThe file system on which the script resides must be mounted with the option scripts.

Correct Answer: B. The script file must be found in the $PATH.; C. The script file must have the executable permission bit set.; D. The script must begin with a shebang-line (#!) that points to the correct interpreter.

Question 3

Which of the following commands can be used to determine how long the system has been running? (Choose TWO correct answers.)

Auptime

Bup

Ctop

Duname -u

Etime --up

Correct Answer: A. uptime; C. top

Question 4

Which of the following lines are valid in the file /etc/hosts? (Choose TWO correct answers.)

A2001:db8::15 www.example.com www

Bwww.example.com www 203.0.13.15

C203.0.113.15 www.example.com www

Dwww.example.com,www 203.0.13.15,2001:db8::15

E2003.0.113.15,2001:db8::15 www.example.com www

Correct Answer: A. 2001:db8::15 www.example.com www; C. 203.0.113.15 www.example.com www

Question 5

What is the default nice level when a process is started using the nice command?

A-10

B10

C20

D0

Correct Answer: B. 10

Question 6

Which of the following is true about IPv6?

AWith IPv6, the TCP port numbers of most services have changed.

BIPv6 no longer supports broadcast addresses.

CIPv4 addresses can be used without any change with IPv6.

DIPv6 no longer supports multicast addresses.

EFor IPv6, UDP and TCP have been replaced by the Rapid Transmission Protocol RTP.

Correct Answer: B. IPv6 no longer supports broadcast addresses.

Question 7

What argument to the -type option of find will match files that are symbolic links? (Specify only the argument and no other options or words.)

Al

Correct Answer: A. l

Question 8

What does the command mount -a do?

AIt mounts all available filesystems onto the current directory.

BIt shows all mounted filesystems.

CIt mounts all user mountable filesystems for the current user.

DIt mounts all filesystems listed in /etc/fstab which have the option auto set.

EIt mounts all filesystems listed in /etc/fstab which have the option noauto set.

Correct Answer: D. It mounts all filesystems listed in /etc/fstab which have the option auto set.

Question 9

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/

Correct Answer: A. /etc/yum.repos.d, /etc/yum.repos.d/, yum.repos.d, yum.repos.d/

Question 10

Which of the following is a valid IPv6 address?

A2001:db8:3241::1

B2001::db8:4581::1

C2001:db8:0g41::1

D2001%db8%9990%%1

E2001.db8.819f..1

Correct Answer: A. 2001:db8:3241::1

Question 11

Which file inside the CUPS configuration directory contains the definition of the printers?

Acups-devices.conf

Bsnmp.conf

Cprintcap.conf

Dprinters.conf

Ecupsd.conf

Correct Answer: D. printers.conf

Question 12

What is true regarding the command sendmail?

AWith any MTA, the sendmail command must be run periodically by the cron daemon.

BAll MTAs, including Postfix and Exim, provide a sendmail command.

CThe sendmail command prints the MTAs queue history of which mails have been sent successfully.

DIt is only available when the sendmail MTA is installed.

Correct Answer: B. All MTAs, including Postfix and Exim, provide a sendmail command.

Question 13

Which of the following are init systems used within Linux systems? (Choose THREE correct answers.)

Astartd

Bsystemd

CUpstart

DSysInit

ESysV init

Correct Answer: B. systemd; C. Upstart; E. SysV init

Question 14

What happens after issuing the command vi without any additional parameters?

Avi starts and loads the last file used and moves the cursor to the position where vi was when it last exited.

Bvi starts and requires the user to explicitly either create a new or load an existing file.

Cvi exits with an error message as it cannot be invoked without a file name to operate on.

Dvi starts in command mode and opens a new empty file.

Evi starts and opens a new file which is filled with the content of the vi buffer if the buffer contains text.

Correct Answer: D. vi starts in command mode and opens a new empty file.

Question 15

Which of the following file permissions belong to a symbolic link?

A-rwxrwxrwx

B+rwxrwxrwx

Clrwxrwxrwx

Dsrwxrwxrwx

Correct Answer: C. lrwxrwxrwx