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)