Down To Date 102-500 Questions 2021

NEW QUESTION 1

Your senior administrator asked you to change the default background of his machine, which uses XDM. Which file would you edit to achieve this?

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

Answer: A

NEW QUESTION 2

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.)

• A. Mastered
• B. Not Mastered

Answer: A

Explanation:
/etc/skel

NEW QUESTION 3

Which of the following steps prevents a user from obtaining an interactive login session?

• A. Run the command chsh -s /bin/false with the user name.
• B. Set the UID for the user to 0.
• C. Remove the user from the group staff.
• D. Add the user to /etc/noaccess.
• E. Create a .nologin file in the user's home directory.

Answer: A

NEW QUESTION 4

Which directory holds the files that configure the xinetd service when using several configuration files instead of an integrated configuration file? (Specify the full path to the directory.)

• A. Mastered
• B. Not Mastered

Answer: A

Explanation:
/etc/xinetd.d/, /etc/xinetd.d

NEW QUESTION 5

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. Mastered
• B. Not Mastered

Answer: A

Explanation:
files

NEW QUESTION 6

What is true about the ntpdate command?

• A. It is the primary management command for the NTP time server.
• B. It updates the local system's date (i.
• C. day, month and year) but not the time (i.
• D. hours, minutes, seconds).
• E. It queries one or more NTP time servers and adjusts the system time accordingly.
• F. It sends the local system time to one or many remote NTP time servers for redistribution.
• G. It can be used by any user to set the user clock independently of the system clock.

Answer: C

NEW QUESTION 7

Which of the following is a valid IPv6 address?

• A. 2001:db8:3241::1
• B. 2001::db8:4581::1
• C. 2001:db8:0g41::1
• D. 2001%db8%9990%%1
• E. 2001.db8.819f..1

Answer: A

NEW QUESTION 8

Which of the following files, when existing, affect the behavior of the Bash shell? (Choose TWO correct answers.)

• A. ~/.bashconf
• B. ~/.bashrc
• C. ~/.bashdefaults
• D. ~/.bash_etc
• E. ~/.bash_profile

Answer: BE

NEW QUESTION 9

Which of the following SQL queries counts the number of occurrences for each value of the field order_type in the table orders?

• A. SELECT order_type,COUNT(*) FROM orders WHERE order_type=order_type;
• B. SELECT order_type,COUNT(*) FROM orders GROUP BY order_type;
• C. COUNT(SELECT order_type FROM orders);
• D. SELECT COUNT(*) FROM orders ORDER BY order_type;
• E. SELECT AUTO_COUNT FROM orders COUNT order_type;

Answer: B

NEW QUESTION 10

What is pool.ntp.org?

• A. A deprecated feature for maintaining system time in the Linux kernel
• B. A website which provides binary and source packages for the OpenNTPD project
• C. A virtual cluster of various timeservers
• D. A community website used to discuss the localization of Linux

Answer: C

NEW QUESTION 11

Which of the following commands can be used to convert text files in one character encoding to another character encoding?

• A. cat
• B. convert
• C. dd
• D. iconv
• E. utf2utf

Answer: D

NEW QUESTION 12

Which command, available with all MTAs, is used to list the contents of the MTA's mail queue? (Specify ONLY the command without any path or parameters.)

• A. Mastered
• B. Not Mastered

Answer: A

Explanation:
mailq, /usr/bin/mailq, sendmail -bp, /usr/sbin/sendmail -bp, /usr/lib/sendmail -bp, sendmail,
/usr/sbin/sendmail, /usr/lib/sendmail

NEW QUESTION 13

What is the purpose of the iconv command?

• A. It converts bitmap images from one format to another such as PNG to JPEG.
• B. It verifies that the root directory tree complies to all conventions from the Filesystem Hierarchy Standard (FHS).
• C. It displays additional meta information from icon files ending in .ico.
• D. It changes the mode of an inode in the ext4 file system.
• E. It converts files from one character encoding to another.

Answer: E

NEW QUESTION 14

Which of the following programs can be used to determine the routing path to a given destination?

• A. dig
• B. netstat
• C. ping
• D. route
• E. traceroute

Answer: E

NEW QUESTION 15

Which of the following keywords can be used in the file /etc/resolv.conf? (Choose TWO correct answers.)

• A. substitute
• B. nameserver
• C. search
• D. lookup
• E. method

Answer: BC

NEW QUESTION 16

Which of the following are commonly used Mail Transfer Agent (MTA) applications? (Choose THREE correct answers.)

• A. Postfix
• B. Procmail
• C. Sendmail
• D. Exim
• E. SMTPd

Answer: ACD

NEW QUESTION 17

On a Linux system with shadow passwords enabled, which file in the file system contains the password hashes of all local users? (Specify the full name of the file, including path.)

• A. Mastered
• B. Not Mastered

Answer: A

Explanation:
/etc/shadow

NEW QUESTION 18

What is the conventional purpose of Linux UIDs that are lower than 100?

• A. They are reserved for super user accounts.
• B. They are reserved for the system admin accounts.
• C. They are reserved for system accounts.
• D. They are unused, aside from 0, because they are targets of exploits.
• E. They are used to match with GIDs in grouping users.

Answer: C

NEW QUESTION 19

What is the command to delete the default gateway from the system IP routing table? (Choose TWO correct answers.)

• A. route del default
• B. ifconfig unset default
• C. netstat -r default
• D. ip route del default
• E. sysctl ipv4.default_gw=0

Answer: AD

NEW QUESTION 20

Which parameter must be passed to ifconfig to activate a previously inactive network interface? (Specify the parameter only without any command, path or additional options)

• A. Mastered
• B. Not Mastered

Answer: A

Explanation:
up

NEW QUESTION 21

What is true regarding the command userdel --force --remove bob? (Choose TWO correct answers.)

• A. The user bob is removed from the system's user database.
• B. The user bob's home directory is removed.
• C. The locate database is updated to drop files owned by bob.
• D. All files owned by bob are remove from all mounted filesystems.
• E. In case bob was the last member of a group, that group is deleted.

Answer: AB

NEW QUESTION 22

What is the lowest numbered unprivileged TCP port? (Specify the number in digits only.)

• A. Mastered
• B. Not Mastered

Answer: A

Explanation:
1024

NEW QUESTION 23
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