106.2 Graphical Desktops LPIC-1 Practice Questions (Page 5)

Questions 21–25

1. 21foundation · easy

   Which file is the traditional main configuration file for the Xorg X server?

   • A/etc/X11/xorg.conf
   • B/etc/X11/xinitrc
   • C/etc/X11/display-manager
   • D/etc/X11/XF86Config
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2. 22application · medium

   A Linux administrator needs to run a GUI-based database administration tool that is installed only on a remote RHEL server. The administrator's local workstation runs a minimal Linux installation with no X server, and the remote server has no display manager configured. The administrator wants to see the tool's window on the local screen. Which approach should be used?

   • ARun `ssh admin@remote 'DISPLAY=:0 dbadmin_tool'` from the local workstation.
   • BRun `ssh -X admin@remote 'dbadmin_tool'` from the local workstation after installing an X server locally.
   • CUse `xauth` to generate an MIT-MAGIC-COOKIE on the local machine and copy it to the remote server before running the tool.
   • DInstall a display manager on the remote server and use VNC to connect to its graphical login screen.
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4. 23application · medium

   After upgrading the graphics driver on a Linux workstation, the X server fails to start and the system drops to a text console. The administrator needs to diagnose the problem. Which file should the administrator examine first to find the specific error messages from the X server?

   • A~/.xsession-errors
   • B/var/log/messages
   • C/etc/X11/xorg.conf
   • D/var/log/Xorg.0.log
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5. 24application · medium

   After a system update, a user reports that the graphical desktop no longer starts. The administrator checks `/var/log/Xorg.0.log` and finds the error `(EE) No devices detected`. Which of the following is the most likely cause and the appropriate first step to resolve it?

   • AThe DISPLAY environment variable is not set; the administrator should export DISPLAY=:0.
   • BThe xorg.conf file has a syntax error; the administrator should run `Xorg -configure` to regenerate it.
   • CThe display manager is not running; the administrator should start GDM or LightDM.
   • DThe X server cannot find a suitable graphics driver; the administrator should check which driver is loaded and consider reinstalling or reconfiguring it.
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6. 25foundation · easy

   What is the purpose of the X11 authentication mechanism known as MIT-MAGIC-COOKIE-1?

   • AIt allows the X server to run as a non-root user.
   • BIt encrypts all network traffic between the X client and server.
   • CIt provides a shared secret token that a client must present to connect to the X server.
   • DIt restricts access to the X server based on the client's IP address.
   Reveal Solution Discussion Select an answer first