Free Lpi 102-500 Practice Exams - Page 9 of 11

Question #81

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: A, C
A, C

Explanation:

The tasks that are handled by a display manager like XDM or KDM are to start and prepare the desktop environment for the user and to handle the login of a user. A display manager is a software component that manages the graphical user interface of an operating system. It provides a login screen where the user can enter their credentials and choose their preferred desktop environment or window manager. After the user is authenticated, the display manager launches the selected desktop environment or window manager and sets up the graphical session. The display manager also handles the logout, shutdown, and reboot of the system.

The other options are incorrect because they are not tasks handled by a display manager:

B. Configure additional devices like new monitors or projectors when they are attached. This task is handled by the X server, which is the core component of the X Window System. The X server is responsible for communicating with the hardware devices, such as the keyboard, mouse, monitor, and graphics card. The X server can detect and configure new devices dynamically using tools like xrandr or xorg.conf.

D. Lock the screen when the user was inactive for a configurable amount of time. This task is handled by the screensaver program, which is a utility that runs in the background and activates when the user is idle for a certain period of time. The screensaver can display various animations or images on the screen, or it can blank the screen entirely. The screensaver can also lock the screen and require the user to enter their password to resume the session. The screensaver can be configured by the user using tools like xscreensaver or gnome-screensaver.

E. Create an X11 configuration file for the current graphic devices and monitors. This task is handled by the X server, which is the core component of the X Window System. The X server can create an

X11 configuration file, which is a text file that contains the settings for the X server and the devices it communicates with. The X11 configuration file is usually located at /etc/X11/xorg.conf or /etc/X11/xorg.conf.d/. The X server can generate a default configuration file using the command Xorg -configure, or it can be edited manually by the user or the system administrator. Reference https://www.baeldung.com/linux/display-managers-explained https://quizlet.com/185979426/lx0-104-flash-cards/

Question #82

You are looking into a new script you received from your senior administrator. In the very first line you notice a #! followed by a file path. This indicates that:

A . The file at that location was used to make the script.
B . This script provides identical functionality as the file at that location.
C . This script will self-extract into a file at that location.
D . The program at that location will be used to process the script.

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Question #83

What is a purpose of an SSH host key?

A . It must be sent by any SSH client in addition to a user key in order to identify the client’s host.
B . It provides the server’s identity information to connecting SSH clients.
C . It is the root key by which all user SSH keys must be signed.
D . It authenticates any user that logs into a remote machine from the key’s host.
E . It is used by system services like cron, syslog or a backup job to automatically connect to remote hosts.

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Question #84

What keyword is missing from this code sample of a shell script?

____ i in *.txt; do

echo $i

done

A . for
B . loop
C . until
D . while

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Question #85

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

A . /etc/bashrc
B . /etc/profile
C . ~/.bash_profile
D . /etc/.bashrc

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Correct Answer: B
B

Explanation:

The /etc/profile file is a configuration file that is read by the Bash shell when a user logs in. It contains commands and settings that apply to all users of the system, such as environment variables, PATH information, terminal settings, and security commands. Environment variables are variables that affect the behavior of programs and processes. For example, the PATH variable defines the directories where the shell looks for executable files, and the JAVA_HOME variable defines the location of the Java installation. The /etc/profile file can also source other files from the /etc/profile.d/ directory, which can contain additional scripts for setting environment variables or other system-wide settings. The /etc/profile file is the best option for setting default shell variables for all users, as it is executed before any user-specific files. The other options are not suitable for this purpose, because:

/etc/bashrc is a configuration file that is read by the Bash shell when it is started as an interactive non-login shell. It contains commands and settings that apply to all interactive shells of the system, such as aliases, functions, and prompt settings. It is not executed when the shell is started as a login shell, which is the case when a user logs in. Therefore, it is not a good place to set default shell variables for all users.

~/.bash_profile is a configuration file that is read by the Bash shell when it is started as a login shell for a specific user. It contains commands and settings that apply only to that user, such as environment variables, PATH information, and startup programs. It can also source other files, such as ~/.bashrc, which is read by the shell when it is started as an interactive non-login shell for that user. It is not a good place to set default shell variables for all users, as it only affects the user who owns the file.

/etc/.bashrc is not a valid configuration file for the Bash shell. The dot (.) at the beginning of the file name indicates that it is a hidden file, which means that it is not visible by default in the file system. The Bash shell does not look for this file when it is started, and it does not execute any commands or settings from it. Therefore, it is not a good place to set default shell variables for all users.

Reference: 1 2

Question #86

What command will display the group names and GIDs to which a user belongs? (Provide only the command name with or without path information)

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Question #87

Which of the following statements about sytemd-journald are true? (Choose three.)

A . It is incompatible with syslog and cannot be installed on a system using regular syslog.
B . It only processes messages of systemd and not messages of any other tools.
C . It can pass log messages to syslog for further processing.
D . It maintains metadata such as _UID or _PID for each message.
E . It supports syslog facilities such as kern, user, and auth.

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Question #88

When the command echo $ outputs 1, which of the following statements is 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.

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Question #89

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

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

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Question #90

An administrator wants to determine the geometry of a particular window in X, so she issues the

__________ -metric command and then clicks on the window.

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