Graphical environment - Quiz Explanation

The correct answers are indicated below, along with the text that explains the correct answers.
1. Which of these lines from a faulty .Xdefaults file is formatted correctly?
Please select the best answer.
  A. xterm:background: blue
  B. xterm:background* blue
  C. xterm*background: blue
  D. xterm*background= blue
  The correct answer is C.
A * is needed between xterm and background.
Answer A is incorrect because the first colon should be a "*." Answer B is incorrect because the * and : should be switched. Answer D is wrong because an = is not allowed.

2. What is the name of the section of gdm.conf that holds the login screen configurations?
Please select the best answer.
  A. [browser]
  B. [login]
  C. [gui]
  D. [greeter]
  The correct answer is D.
[greeter] is the name of the section of gdm.conf that holds the login screen configurations.
Answer A is incorrect because this section holds the browser settings. Answer B is incorrect because this section doesn't exist. Answer C is incorrect because it holds configuration for only the screen.

3. What is the purpose of the virtual desktop?
Please select the best answer.
  A. To provide a larger effective desktop
  B. To provide a special desktop for scratch work
  C. It allows multiple users to share a desktop
  D. It makes configuring the desktop easier
  The correct answer is A.
The purpose of the virtual desktop is to provide a larger, effective desktop.
Answer B is incorrect because virtual desktops do not need to hold scratch work nor are they "special." Answer C is incorrect because virtual desktops only pertain to a single login session. Answer D is incorrect because virtual desktops do not facilitate configuration.

4. Which window manager is most appropriate when you lack a lot of system memory?
Please select the best answer.
  A. Enlightenment
  B. sawmill
  C. fvwm2
  D. KDE/kwm
  The correct answer is C.
fvwm2 leaves the most system resources free of any of the window managers covered.
A, B and D are incorrect because they each require large amounts of memory to be productive.

5. What command is used to tell the X server to accept remote X connections?
Please select the best answer.
  A. GNOME-panel
  B. gdm
  C. xallow
  D. xhost
  The correct answer is D.
xhost is used to tell the X server to accept remote X connections.
Answer A is incorrect because GNOME-panel provides a place for GUI buttons.
Answer B is incorrect because gdm provides a graphical login.
Answer C is incorrect because there is not any such command.