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QUESTION 1
What is true regarding the statement beginning with #! that is found in the first line of a script?
A. It prevents the script from being executed until the ! is removed.
B. It specifies the path and the arguments of the interpreter used to run the script.
C. It is a comment that is ignored by the script.
D. It specifies the character encoding of the script.
Correct Answer: B
QUESTION 2
Which Bash option prevents a user from accidentally overwriting a file with a “>”?
A. set -o safe
B. set -o noglob
C. set -o noclobber
D. set -o append
E. set -o nooverwrite
Correct Answer: C
QUESTION 3
Which of the following commands prints the exit value of the most recently executed program in Bash?
A. echo $?
B. echo $#
C. echo $exit
D. echo $status
E. echo $&
Correct Answer: A
QUESTION 4
Which of the following SQL statements will select the fields name and address from the contacts table?
A. SELECT (name, address) FROM contacts;
B. SELECT (name address) FROM contacts;
C. SELECT name, address FROM contacts;
D. SELECT name address FROM contacts;
Correct Answer: C
QUESTION 5
Which of the following configuration files should be modified to globally set shell variables for all users?
A. /etc/bashrc
B. /etc/profile
C. ~/.bash_profile
D. /etc/.bashrc
Correct Answer: B
QUESTION 6
Which of the following commands are used to manage the environment and shell variables within a shell process? (Choose TWO correct answers.)
A. export
B. init
C. reset
D. set
E. tset
Correct Answer: AD
QUESTION 7
Which of the following are operators used for comparisons by the test command? (Choose TWO correct answers.)
A. equals
B. =
C. -is
D. -eq
E. null
Correct Answer: BD
QUESTION 8
Which of the following commands creates a function in Bash that outputs the sum of two numbers?
A. function sumitup { echo $(($1 + $2)) ; }
B. command sumitup { echo $(($1 + $2)) ; }
C. function sumitup { echo $1 + $2 ; }
D. method sumitup { echo $1 + $2 ; }
E. command sumitup { echo $1 + $2 ; }
Correct Answer: A
QUESTION 9
What output will the following command sequence produce?
echo ‘1 2 3 4 5 6’ | while read a b c; do echo result: $c $b $a; done
A. result: 3 4 5 6 2 1
B. result: 1 2 3 4 5 6
C. result: 6 5 4
D. result: 6 5 4 3 2 1
E. result: 3 2 1
Correct Answer: A
QUESTION 10
When the command echo $? outputs 1, which of the following statements are true?
A. It is the process ID of the echo command.
B. It is the process ID of the current shell.
C. It is the exit value of the command executed immediately before echo.
D. It is the exit value of the echo command.
Correct Answer: C
QUESTION 11
Which command makes the shell variable named VARIABLE visible to subshells?
A. export $VARIABLE
B. export VARIABLE
C. set $VARIABLE
D. set VARIABLE
E. env VARIABLE
Correct Answer: B
QUESTION 12
What output will the command seq 10 produce?
A. A continuous stream of numbers increasing in increments of 10 until stopped.
B. The numbers 1 through 10 with one number per line.
C. The numbers 0 through 9 with one number per line.
D. The number 10 to standard output.
Correct Answer: B
QUESTION 13
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
Correct Answer: BE
QUESTION 14
After issuing:
function myfunction { echo $1 $2 ; }
in Bash, which output does:
myfunction A B C
Produce?
A. A B
B. A B C
C. A C
D. B C
E. C B A
Correct Answer: A
QUESTION 15
Which of the following commands puts the output of the command date into the shell variable mydate?
A. mydate=”$(date)”
B. mydate=”exec date”
C. mydate=”$((date))”
D. mydate=”date”
E. mydate=”${date}”
Correct Answer: A
QUESTION 16
What is the purpose of the sticky keys feature in X?
A. To assist users who have difficulty holding down multiple keys at once.
B. To prevent repeated input of a single character if the key is held down.
C. To ignore brief keystrokes according to a specified time limit.
D. To repeat the input of a single character.
Correct Answer: A
QUESTION 17
On a machine running several X servers, how are the different instances of the X11 server identified?
A. By a fixed UUID that is defined in the X11 configuration file.
B. By a unique IPv6 address from the fe80::/64 subnet.
C. By the name of the user that runs the X server like x11:bob.
D. By a device name like /dev/X11/xservers/1.
E. By a display name like:1.
Correct Answer: E
QUESTION 18
What is the purpose of the xhost program?
A. Grant or revoke access to a X11 session.
B. Install all packages and video drivers required to run X11 on a host.
C. Start the X11 server and announce its availability within the local network.
D. Send informational messages to all users logged into a host using X11.
E. Display the MOTD and other important information when a user logs in via X11.
Correct Answer: A
QUESTION 19
What of the following statements is true regarding a display manager?
A. A display manager handles remote X11 logins only and has no purpose on a system that is not attached to a network.
B. The display manager is configured in the X11 configuration file xorg.conf.
C. There is only one display manager X11DM that must be started on all systems running X11.
D. After system startup, the display manager handles the login of a user.
E. Without a display manager, no graphical programs can be run.
Correct Answer: D
QUESTION 20
How is a display manager started?
A. It is started by a user using the command startx.
B. It is started like any other system service by the init system.
C. It is started by inetd when a remote hosts connects to the X11 port.
D. It is started automatically when a X11 user logs in to the system console.
Correct Answer: B QUESTION 21
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 22
For accessibility assistance, which of the following programs is an on-screen keyboard?
A. xkb
B. atkb
C. GOK
D. xOSK
Correct Answer: C
QUESTION 23
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
QUESTION 24
Which of the following commands can modify or set the password expiration for a user? (Choose TWO correct answers.)
A. chage
B. chexpiration
C. shadowconfig
D. passwd
E. userconf
Correct Answer: AD
QUESTION 25
Which of the following statements is true regarding the /etc/shadow file?
A. /etc/shadow may not be readable or writable by user root.
B. Only root is allowed to read and write /etc/shadow.
C. All users have full read and write access to /etc/shadow.
D. All users have full read access to /etc/shadow.
Correct Answer: B
QUESTION 26
Which of the following commands will convert files from one character encoding to another?
A. convert
B. enc2utf
C. iconv
D. transcode
Correct Answer: C QUESTION 27
Which environment variable will override all LC_* variables?
A. LANG
B. LC_ALL
C. LC_COLLATE
D. LOCALE
Correct Answer: B QUESTION 28
Which command will set the local machine’s timezone to UTC?
A. cat UTC > /etc/timezone
B. ln -s /usr/share/zoneinfo/UTC /etc/localtime
C. date –timezone=UTC
D. mv /usr/timezone/UTC /etc
Correct Answer: B QUESTION 29
Which of the following actions prevents a specific user from scheduling tasks using at or batch?
A. Add the specific user to the /etc/at.allow file.
B. Add the specific user to the [deny] section in the /etc/atd.conf file.
C. Add the specific user to the /etc/at.deny file.
D. Add the specific user to the nojobs group.
E. Run atd –deny followed by the name of the specific user.
Correct Answer: C QUESTION 30
What is the main difference between the batch and at commands?
A. The batch command will run multiple times. The at command will only run once.
B. The commands of a batch job run sequentially one after another while the commands in at jobs may run in parallel.
C. The at command reads commands from standard input. The batch command requires a command line argument.
D. The at command e-mails results to the user. The batch command logs results to syslog.
Correct Answer: B QUESTION 31
Why should a regular user edit his personal crontab by using the command crontab instead of just editing his crontab file manually?
A. Because user specific crontab entries are stored in a common database and must be extracted before editing.
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