CS4/53201 "Operating Systems"

		HOMEWORK #3

	Due in class on Tuesday, 4/29/03

1. (OSC 11.6) Could you ...

2. (OSC 12.1) Consider a file ...

3. (OSC 12.2) Consider a system where ...

4. (OSC 13.11) Distinguish ...

5. (OSC 14.2) Suppose that a disk ...

6. (OSC 14.10 a. and b. only) Requests are not ...

7. Explain the differences in reliability of RAID levels 0+1 and 10.

8. Discuss why high availability is a more suitable task for a cluster
   than a classical distributed system. Explain what properties
   of a cluster make this task particularly suitable for it.

9. List main differences between the design approaches of 
   Network File System (NFS) and Andrew File System (AFS)

10. Under what circumstances would SIGHUP signal not terminate the process?
   Explain what the programmer should do to have his program
   (rather than operating system) handle division by zero.

11. Describe the difference between secrecy and security. Can there be
   a violation of security without compromising secrecy. Give an
   example.