Madras University (UnOM) 2006 M.C.A Computer Aplications Operating System - Question Paper

Time: 3 hours
Maximum: 75 marks

PART A - [5 x five = Marks 25]
ans ALL ques..
All ques. carry equal marks.

1. (a) Write the features of distributed system.

Or

(b) discuss Unix system structure.

2. (a) Write the criteria used to determine the best CPU scheduling algorithm.

Or

(b) Briefly explain about semaphores.

3. (a) What is compaction?

Or

(b) Write short notes on thrashing.

4. (a) Write the various operations performed on a file.

Or

(b) What is encryption?

5. (a) discuss Unix directory structure.

Or

(b) Why should low level system calls are used instead of C threads package?

PART B - [5 x 10 = Marks 50]
ans any 5 ques..
All ques. carry equal marks.

6. explain in detail about operating system services.

7. discuss interprocess communication.

8. define
(a) round robin scheduling
(b) priority scheduling.

9. discuss the demand paging.

10. explain SSTF scheduling and CSCAN scheduling.

11. How protection scheme is implemented in Unix and MULTICS?

12. explain in detail about Kernel and permissions of Unix operating systems.

13. define the organization of MS DOS hierarchical file system.

Earning:   Approval pending.