Hmmm... why do these questions look like they've been lifted straight out of a test? I do not dis
believe that your friend would ask you such questions, but I doubt that s/he would give you an inquisition of multiple choice
Come on! If this is an attempt to get us to answer your homework/test questions, then you may be out of luck. Although, pointing you in the right direction for the answers (ie where to look) may be forthcoming.
For questions 4 and 6, check out the Kernel howto on www.tldp.org