Madurai Kamraj University (MKU) 2006 M.C.A VIII - OPERATING SYSTEM - Question Paper

Time: 3 hours Maximum: 100 marks
PART A ans ALL ques.. (8 x five = 40 marks)

1. (a) Write short note on early operating system. List the differences ranging from
Multiprogramming and Time-sharing systems. Or
(b) discuss the architecture of an operating system.

2. (a) List out the different process states and briefly discuss with a state diagram. Or
(b) What do you mean by processor scheduling? discuss the different levels of scheduling.

3. (a) discuss the methods of dead lock prevention and avoidance. Or
(b) Write briefly on fragmentation and swapping.

4. (a) Why disk scheduling is necessary? discuss the various seek optimization techniques.
Or
(b) define the various mechanisms used to protect a file.

5. (a) discuss the design principles of Unix
(b) Write a short note on Unix file system

6. (a) Write short notes on Demand Page Memory management. Or
(b) What is segmentation? State it usages.

7. (a) discuss the concepts involved in maintaining the file system security. Or
(b) Write short notes on double - buffering.

8. (a) List the different merits of treating directories and devices as file in Unix. Or
(b) Write short notes on I/O systems on Unix

PART B ans ALL ques.. (5 x 12 = 60 marks)

9. (a) discuss the different functions of an operating system from a system programmer's
view.
Or
(b) What is s'emaphore? discuss the application of semaphore.

10. (a) Compare preemptive and non-preemptive algorithm. Or
(b) discuss the Banker's algorithm for dead -lock avoidance.

11. (a) discuss any 4 page replacement algorithms. Or
(b) State about virtual memory concept.

12. (a) define the different disk scheduling algorithms. Or
(b) provide an overview of the different protection and access control mechanisms
implemented in a
file system.

13. (a) explain the file protection mechanisms incorporated in a Unix file system. Or
(b) List the calls in Unix for process management and write the function of each

Earning:   Approval pending.