Linux Foundation Linux Foundation Certified SYSADMIN LFCS Questions & Answers

• Question 1:

  Which of the following statements is valid in the file /etc/nsswitch.conf?

  A. multi on

  B. 192.168.168.4 dns-server

  C. hosts: files dns

  D. include /etc/nsswitch.d/

  Correct Answer: C

• Question 2:

  How many IP-addresses can be used for unique hosts inside the IPv4 subnet 192.168.2.128/28? (Specify the number only without any additional information.)

  A. 14

  Correct Answer: A

• Question 3:

  What is the purpose of the Bash built-in export command?

  A. It allows disks to be mounted remotely.

  B. It runs a command as a process in a subshell.

  C. It makes the command history available to subshells.

  D. It sets up environment variables for applications.

  E. It shares NFS partitions for use by other systems on the network.

  Correct Answer: D

• Question 4:

  Which of the following commands will send output from the program myapp to both standard output (stdout) and the file file1.log?

  A. cat < myapp | cat > file1.log

  B. myapp 0>and1 | cat > file1.log

  C. myapp | cat > file1.log

  D. myapp | teefile1.log

  E. tee myapp file1.log

  Correct Answer: D

• Question 5:

  What can the Logical Volume Manager (LVM) be used for? (Choose THREE correct answers.)

  A. To create RAID 9 arrays.

  B. To dynamically change the size of logical volumes.

  C. To encrypt logical volumes.

  D. To create snapshots.

  E. To dynamically create or delete logical volumes.

  Correct Answer: BDE

• Question 6:

  Which of the following commands shows the current color depth of the X Server?

  A. xcd

  B. xcdepth

  C. xwininfo

  D. xcolordepth

  E. cat /etc/X11

  Correct Answer: C

• Question 7:

  Which of the following commands set the sticky bit for the directory /tmp? (Choose TWO correct answers.)

  A. chmod +s /tmp

  B. chmod +t /tmp

  C. chmod 1775 /tmp

  D. chmod 4775 /tmp

  E. chmod 2775 /tmp

  Correct Answer: BC

• Question 8:

  On a regular users workstation the route command takes a long time before printing out the routing table. Which of the following errors does that indicate?

  A. The local routing information may be corrupted and must be re-validated using a routing protocol.

  B. One of the routers in the routing table is not available which causes the automatic router failure detection mechanism (ARF-D) to wait for a timeout.

  C. There may accidentally be more than one default router in which case a default router election has to be done on the network in order to choose one router as the default.

  D. DNS resolution may not be working as route by default tries to resolve names of routers and destinations and may run into a timeout.

  Correct Answer: D

• Question 9:

  With X11 forwarding in ssh, what environment variable is automatically set in the remote host shell that is not set when X11 forwarding is not enabled? (Specify only the environment variable without any additional commands or values.)

  A. DISPLAY, $DISPLAY

  Correct Answer: A

• Question 10:

  Which of the following are tasks handled by a display manager like XDM or KDM? (Choose TWO correct answers.)

  A. Start and prepare the desktop environment for the user.

  B. Configure additional devices like new monitors or projectors when they are attached.

  C. Handle the login of a user.

  D. Lock the screen when the user was inactive for a configurable amount of time.

  E. Create an X11 configuration file for the current graphic devices and monitors.

  Correct Answer: AC