Question 1
Why was the Sun installation done with a pretty graphical interface but the linux one done with an ugly text-based interface? Say something about hardware expectations. (One sentence.)
Answer 1
Suns installation expects you to have their graphics hardware, whereas Redhat is prepared for you to have any graphics card.
Note:
Some people mentioned that the Linux attitude is "lean and mean". This may be true, but we were talking about the Redhat installation. Redhat would kill to be able to have a graphical install program --- it just isn't possible for them to keep the distribution CDs current with all of the new graphics hardware (they would have to release a CD once a month).

Question 2
Use dejanews http://www.dejanews.com to determine what X server you need for linux on your Dell Latitude laptop. (Give the words you used for your query, and the name of the X-server.)
Answer 2
Any of: XFree86 (versions >= 3.3.3), XFCom, Xi, Accelerated-X (perhaps others) will work with the latitude laptop. Sample query "linux dell latitude".

Question 3
Your current directory is /. Give a UNIX command sequence that will count the number of files (don't worry about ones with names beginning with a '.') in the directory /tmp/foo. (The output should just be the number of files [and perhaps some whitespace] --- no other numbers or words.)
Answer 3
ls /tmp/foo | wc -l.
You should use -l instead of -w because filenames can have spaces in them.