Anna University of Technology Tirunelveli 2009-4th Sem B.E Computer Science and Engineering ANNA UNIVERSITY ./B.Tech / ,ester(regulation 2004)for - Question Paper

Time:3 hours maximum:100 marks



part A (10*2=20 marks)



1. what is the difference ranging from OS for mainframe and desktop system?

2. differentiate long term scheduler from short term scheduler.

3. describe critical region.

4. what is meant by monitors?

5. what is safe state? provide the use of safe state in deadlock avoidance.

6. why is paging used?

7. what is meant by demand paging?

8. what is the importance of shell in Linux?

9. describe thrashing.

10. differentiate worms from virus.


part B (5*16=80)


11.(a) define in details the activities involved in sharing of info ranging from 2 processes. (16)
(or)

(b) write short notes on: (10+6)
(1) virtual machine.

(2) hardware protection


12. (a) explain how the dinning philosopher's issue can be solved by monitors. (16)


(or)

(b) discuss the different process scheduling algorithms with example. (16)


13. (a) explain how deadlock can be avoided and detected. (16)


(or)

(b) define segmentation . (16)


14. (a) discuss the different page replacement algorithms with example. (16)

(or)

(b) why is file protection necessary ?explain the techniques used for file protection. (16)

15. (a) explain the file system in Linux . (16)

(or)

(b) explain in details the disk management techniques followed in OS. (16)

Earning:   Approval pending.