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CNIT 340 Exam 2 Questions And Answers With Verified Solutions Latest Updated 2024
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CNIT 340 Exam 2 Questions And Answers With Verified Solutions Latest Updated 2024
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CNIT 340 Exam 2 Questions AndAnswers With Verified Solutions Latest
Updated 2024
AKA Display server - ANSWER✔✔X-server
Software that presents the output of an application to the display -
ANSWER✔✔X-server
Located on the computer where the end user is working - ANSWER✔✔x-server
GUI applications themselves - ANSWER✔✔x-client
What does the x-client GUI do? - ANSWER✔✔- sends graphical request
- gets user input
T/F: X-Client is linked with X-Server through X protocol translated by Xlib -
ANSWER✔✔T
The computer - ANSWER✔✔host
A ____ can be an X Server, a X client, or both - ANSWER✔✔host
A ____ is equivalent to a keyboard and monitor combination - ANSWER✔✔display
Each server has at least ____ display - ANSWER✔✔one
A virtual desktop - ANSWER✔✔Screen
Each display has at least ____ screen - ANSWER✔✔one
T/F: A display may have multiple screens - ANSWER✔✔T
What command starts an X Windows enviornment? - ANSWER✔✔xstart
,T/F: X display manager will prompt for just a username - ANSWER✔✔F
- username and password
Where is the X display manager usually located? - ANSWER✔✔/etc/X11 folder
Display manager will execute ____ shell script to setup the user's desktop
environment - ANSWER✔✔xsession
xsession starts all the programs in background, except ____ - ANSWER✔✔the last
one
how to store in the DISPLAY environment variable -
ANSWER✔✔DISPLAY=host.domain.name:x.y; export DISPLAY
- x is the display number
- y is the screen number
T/F: for the display x.y, 0.0 is typically correct - ANSWER✔✔T
T/F: Display set in one shell (xterm) and will not work in a different shell -
ANSWER✔✔T
X still has ____ and ____ - ANSWER✔✔stdout and stderr
how do you select DISPLAY? - ANSWER✔✔the -display flag
ex:
dir/app -display host.domain:x.y
How do you add an allowed host? - ANSWER✔✔xhost +hostname
How do you remove an allowed host? - ANSWER✔✔xhost -hostname
Why do we need X11 over SSH? - ANSWER✔✔- increased security
- Allows X to pass through firewalls configured to only allow secure protocols
- The display server is "tricked" into believing the remote X client is a local X client
, what is different with the display variable when using X11 on SSH? - ANSWER✔✔x
starts at 10 and increments each SSH
DISPLAY=localhost:10.0
How do you enable X11 tunneling? - ANSWER✔✔ssh -X remote host
How do you turn off X11 tunneling? - ANSWER✔✔ssh -x remote host
What are the three I/O streams in Unix/Linux - ANSWER✔✔- stdin
- stdout
- stderr
where input to the application is sourced - ANSWER✔✔stdin
where output from the application is sent - ANSWER✔✔stdout
where errors messages are sent - ANSWER✔✔stderr
How to redirect input and output streams? - ANSWER✔✔/dev/null
How to 'filter' unwanted output? - ANSWER✔✔grep
What must be the first line of a bash script? - ANSWER✔✔#!/path/to/bash
ex:
#!/bin/bash
Why have #!/bin/bash be the first line? - ANSWER✔✔- Indicates which shell to
use for the script
- A new instance of the shell is forked and the remainder of the code runs in this
shell
What type of file is a shell script (binary, text, library, or?) - ANSWER✔✔Test file
(UNIX text)
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