LX0-104 Online Training Archives

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1. Topic 1, Shells, Scripting and Data Management

What is true regarding the statement beginning with #! that is found in the first line of a script?

It prevents the script from being executed until the ! is removed.

It specifies the path and the arguments of the interpreter used to run the script.

It is a comment that is ignored by the script.

It specifies the character encoding of the script.

2. Which Bash option prevents a user from accidentally overwriting a file with a ">"?

set -o safe

set -o noglob

set -o noclobber

set -o append

set -o nooverwrite

3. Which of the following commands prints the exit value of the most recently executed program in Bash?

echo $?

echo $#

echo $exit

echo $status

echo $&

4. What word will complete an if statement in bash such as the following: if [ -x "$file" ]; then echo $file _____ (Please provide the missing word only)

5. What word is missing from the following SQL statement? update tablename ____ fieldname='value' where id=909; (Please specify the missing word using lower_case letters only.)

6. Which of the following SQL statements will select the fields name and address from the contacts table?

SELECT (name, address) FROM contacts;

SELECT (name address) FROM contacts;

SELECT name, address FROM contacts;

SELECT name address FROM contacts;

7. Which of the following configuration files should be modified to globally set shell variables for all users?

/etc/bashrc

/etc/profile

~/.bash_profile

/etc/.bashrc

8. Which of the following commands are used to manage the environment and shell variables within a shell process? (Choose TWO correct answers.)

export

init

reset

set

tset

9. Which of the following are operators used for comparisons by the test command? (Choose TWO correct answers.)

equals

-is

-eq

null

10. Which of the following commands creates a function in Bash that outputs the sum of two numbers?

function sumitup {echo $(($1 + $2)) ;}

command sumitup {echo $(($1 + $2)) ;}

function sumitup {echo $1 + $2 ;}

method sumitup {echo $1 + $2 ;}

command sumitup {echo $1 + $2 ;}

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11. 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

result: 3 4 5 6 2 1

result: 1 2 3 4 5 6

result: 6 5 4

result: 6 5 4 3 2 1

result: 3 2 1

12. When the command echo $ outputs 1, which of the following statements are true?

It is the process ID of the echo command.

It is the process ID of the current shell.

It is the exit value of the command executed immediately before echo.

It is the exit value of the echo command.

13. What word is missing from the following SQL statement? insert into tablename ________(909, 'text'); (Please specify the missing word using lower-case letters only.)

14. Which command makes the shell variable named VARIABLE visible to subshells?

export $VARIABLE

export VARIABLE

set $VARIABLE

set VARIABLE

env VARIABLE

15. What output will the command seq 10 produce?

A continuous stream of numbers increasing in increments of 10 until stopped.

The numbers 1 through 10 with one number per line.

The numbers 0 through 9 with one number per line.

The number 10 to standard output.

16. 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.)

17. What word is missing from the following SQL statement?

__________ count (*) from tablename;

(Please specify the missing word using lower-case letters only.)

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

~/.bashconf

~/.bashrc

~/.bashdefaults

~/.bash_etc

~/.bash_profile

19. After issuing: function myfunction { echo $1 $2 ; } in Bash, which output does: myfunction A B C Produce?

A B

A B C

A C

B C

C B A

20. Which of the following commands puts the output of the command date into the shell variable mydate?

mydate="$(date)"

mydate="exec date"

mydate="$((date))"

mydate="date"

mydate="${date}"

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21. Topic 2, User Interfaces and Desktops

What is the purpose of the sticky keys feature in X?

To assist users who have difficulty holding down multiple keys at once.

To prevent repeated input of a single character if the key is held down.

To ignore brief keystrokes according to a specified time limit.

To repeat the input of a single character.

22. On a machine running several X servers, how are the different instances of the X11 server identified?

By a fixed UUID that is defined in the X11 configuration file.

By a unique IPv6 address from the fe80:: /64 subnet.

By the name of the user that runs the X server like x11: bob.

By a device name like /dev/X11/xservers/1.

By a display name like: 1.

23. What is the purpose of the xhost program?

Grant or revoke access to a X11 session.

Install all packages and video drivers required to run X11 on a host.

Start the X11 server and announce its availability within the local network.

Send informational messages to all users logged into a host using X11.

Display the MOTD and other important information when a user logs in via X11.

24. What of the following statements is true regarding a display manager?

A display manager handles remote X11 logins only and has no purpose on a system that is not attached to a network.

The display manager is configured in the X11 configuration file xorg.conf.

There is only one display manager X11DM that must be started on all systems running X11.

After system startup, the display manager handles the login of a user.

Without a display manager, no graphical programs can be run.

25. How is a display manager started?

It is started by a user using the command startx.

It is started like any other system service by the init system.

It is started by inetd when a remote hosts connects to the X11 port.

It is started automatically when a X11 user logs in to the system console.

26. What is the default name of the configuration file for the Xorg X11 server? (Specify the file name only without any path.)

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

xcd

xcdepth

xwininfo

xcolordepth

cat /etc/X11

28. For accessibility assistance, which of the following programs is an on-screen keyboard?

xkb

atkb

GOK

xOSK

29. What is the name of the simple graphical login manager that comes with a vanilla X11 installation? (Specify ONLY the command without any path or parameters.)

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

Start and prepare the desktop environment for the user.

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

Handle the login of a user.

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

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