LX0-104 by CompTIA Valid Free Exam Practice Test

Question 1

To prevent a specific user from scheduling tasks with at, what should the administrator do?

A. Add the specific user to /etc/at.allow file. B. Run the following: atd --deny [user]. C. Add the specific user to /etc/at.deny file. D. Add the specific user to [deny] section in the /etc/atd.conf file. E. Add the specific user to nojobs group.

Correct Answer: C

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Question 2

FILL BLANK
Which command, depending on its options, can display the open network connections, the routing tables, as well as network interface statistics. (Specify ONLY the command without any path or parameters.)

Correct Answer:

netstat -or- /bin/netstat -or- ss -or- /usr/bin/ss
Section: Networking Fundamentals

Question 3

Given the following routing table:

How would an outgoing packet to the destination 192.168.2.150 be handled?

A. It would be passed to the default router 192.168.178.1 on wlan0. B. It would be directly transmitted on the device eth0. C. It would be passed to the router 192.168.1.1 on eth0. D. It would be passed to the default router 255.255.255.0 on eth0. E. It would be directly transmitted on the device wlan0.

Correct Answer: C

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Question 4

Which of the following actions prevents a specific user form scheduling tasks usingatorbatch?

A. Add the specific user to the [deny] section in the/etc/std.conffile. B. Add the specific user to the/etc/at.denyfile. C. Runatd --denyfollowed by the name of the specific user. D. Add the specific user to thenojobsgroup. E. Add the specific user to the/etc/ at.allowfile.

Correct Answer: B

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Question 5

When trying to unmount a device it is reported as being busy. Which of the following commands could be used to determine which process is causing this?

A. debug B. strace C. nessus D. traceroute E. lsof

Correct Answer: E

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Question 6

Fill in the blank.
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.)

Correct Answer:

DISPLAY -or- $DISPLAY
Section: Security

Question 7

Which of the following details is NOT provided in any output from the netstat utility?

A. network connections B. routing tables C. broadcast services D. masquerading connections E. interface statistics

Correct Answer: C

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Question 8

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

A. printers.conf B. snmp.conf C. cups-devices.conf D. cupsd.conf E. printcap.conf

Correct Answer: A

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Question 9

Which of the following IPv4 networks are reserved by IANA for private address assignment and private routing? (Choose THREE correct answers.)

A. 172.16.0.0/12 B. 192.168.0.0/16 C. 127.0.0.0/8 D. 169.255.0.0/16 E. 10.0.0.0/8

Correct Answer: A,B,E

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Question 10

What is true about the file /etc/localtime?

A. It is a plain text file containing a string such as Europe/Berlin. B. It is either a symlink to or a copy of a timezone information file such as
/usr/share/zoneinfo/Europe/Berlin. C. It is created and maintained by the NTP service based on the geolocation of the system's IP address. D. It is a symlink to /sys/device/clock/ltime and always contains the current local time.

Correct Answer: B

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Question 11

FILL BLANK
By default, the contents of which directory will be copied to a new user's home directory when the account is created by passing the -m option to the useradd command? (Specify the full path to the directory.)

Correct Answer:

/etc/skel
Section: Shells, Scripting and Data Management

Question 12

Which of the following fields are available in both the global /etc/crontab file as well as in user-specific crontab files? (Select TWO correct answers)

A. Minute B. Command C. Username D. Year

Correct Answer: A,B

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Question 13

Which file used by XDM specifies the default wallpaper?

A. /etc/X11/xdm.conf B. /etc/X11/xdm/Defaults C. /etc/X11/xdm/Xsetup D. /etc/X11/defaults.conf

Correct Answer: C

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Question 14

How can the existing environment variable FOOBAR be suppressed for the execution of the script./myscript only?

A. set -a FOOBAR="";./myscript B. env -i FOOBAR./myscript C. unset -v FOOBAR;./myscript D. env -u FOOBAR./myscript

Correct Answer: D

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Question 15

FILL BLANK
In which file, if present, must all users be listed that are allowed to use the cron scheduling system? (Specify the full name of the file, including path.)

Correct Answer:

/etc/cron.allow
Section: Administrative Tasks

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