Linux Foundation Certified System Administrator (LFCS) Free Practice Test

Question 1

After successfully creating a hard link called bar to the ordinary file foo, foo is deleted from the filesystem. Which of the following describes the resulting situation?

A. Both foo and bar would remain accessible.

B. foo would be removed while bar would remain accessible.

C. foo and bar would both be removed.

D. foo would be removed. bar would still exist but would be unusable.

E. The user is prompted whether bar should be removed, too.

Correct Answer: B

Question 2

CORRECT TEXT
Which umask value will result in the default access permissions of 600 (rw-------) for files and 700 (rwx------) for directories? (Specify only the numerical umask value.)

Correct Answer:

0077, 077

Question 3

Which of the following commands can remove a user from a group?

A. grouprm

B. usergroups

C. passwd

D. groupmod

E. usermod

Correct Answer: E

Question 4

In order to display all currently mounted filesystems, which of the following commands could be used? (Choose TWO correct answers.)

A. lsmounts

B. cat /proc/self/mounts

C. free

D. cat /proc/filesystems

E. mount

Correct Answer: B,E

Question 5

When given the following command line.
echo "foo bar" | tee bar | cat
Which of the following output is created?

A. tee bar

B. cat

C. bar

D. foo bar

E. foo

Correct Answer: D

Question 6

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

A. +rwxrwxrwx

B. lrwxrwxrwx

C. srwxrwxrwx

D. -rwxrwxrwx

Correct Answer: B

Question 7

Which of the following find commands will print out a list of files owned by root and with the SUID bit set in /usr?

A. find /usr -ls \*s\* -u root

B. find /usr -uid 0 -perm +4000

C. find -type suid -username root -d /usr

D. find -user root +mode +s /usr

E. find /usr -suid -perm +4000

Correct Answer: B

Question 8

CORRECT TEXT
Which world-writable directory should be placed on a separate partition inorder to prevent users from being able to fill up the / filesystem? (Specify the full path to the directory.)

Correct Answer:

/tmp, tmp, /var/tmp, /tmp/, /var/tmp/

Question 9

Which type of filesystem is created by mkfs when it is executed with the block device name only and without any additional parameters?

A. ext4

B. ext3

C. ext2

D. VFAT

E. XFS

Correct Answer: C

Question 10

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. 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.

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

C. 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.

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 11

When starting a program with the nice command without any additional parameters, which nice level is set for the resulting process?

A. 20

B. 0

C. -10

D. 10

Correct Answer: D

Question 12

CORRECT TEXT
Which option to the yum command will update the entiresystem? (Specify ONLY the option name without any additional parameters.)

Correct Answer:

update, upgrade

Question 13

What of the following statements are true regarding /dev/ when using udev? (Choose TWO correct answers.)

A. The content of /dev/ is stored in /etc/udev/dev and is restored during system startup.

B. The /dev/ directory is a filesystem of type tmpfs andis mounted by udev during system startup.

C. Entries for all possible devices get created on boot even if those devicesare not connected.

D. When using udev, it is not possible to create block or character devices in /dev/ using mknod.

E. Additional rules for udev can be created by adding them to /etc/udev/rules.d/.

Correct Answer: B,E

Question 14

What is the purpose of the file /etc/profile?

A. It contains default application profiles for users that run an application for the first time.

B. It contains security profiles defining which users are allowed to log in.

C. It contains the welcome message that is displayed after login.

D. It contains environment variables that are set when a user logs in.

Correct Answer: D

Question 15

CORRECT TEXT
What two character sequence is present at the beginning of an interpreted script? (Please specify the TWO correct characters only)

Correct Answer:

#!

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Linux Foundation Certified System Administrator (LFCS) Free Practice Test