UNIVERSITY OF HOUSTON
               Department of Computer Science

                COSC 6360-OPERATING SYSTEMS
        FINAL EXAMINATION AND QUALIFYING EXAMINATION
                     General Questions

                        May 11, 1994


CLOSED BOOK: You may have with you two sheets of notes.


1.   Contrast the advantages and  disadvantages  of  message
     passing  versus shared memory for interprocess communi-
     cation.  (20 points)

2.   Most network file systems were designed  to  support  a
     well  defined  community  of  users  sharing a few file
     servers.  How would you design a  network  file  system
     allowing  its  users to access files located on servers
     around the world as if they were on one  of  the  local
     servers?   Some of the issues to consider are flexibil-
     ity, security and performance. (20 points)