Periyar University 2008 B.Sc Computer Science (CS) / (IS) /B.C.A - Operating System - Question Paper

S.No.204 Paper code:06 UCA 10/06 UCS 08/06 UIS 08


B.Sc (CS) /B.Sc (IS) /B.C.A DEGREE EXAMINATION,
OCTOBER/NOVEMBER 2008

5th Semester

OPERATING SYSTEM

Time:Three hours Maximum:100 marks

PART A [Marks 2*10=20]

ans ALL ques..

1. What is operating system?

2. What is an interrupt?

3. What is critical section?

4. What is deadlock?

5. What is the advantage and its weakness of fixed partitioning of memory?

6. What is paging?

7. What is long term scheduling?

8. What is throughput?

9. What is a database?

10. elaborate the operations to be performed on a directory?


PART B [Marks 4*5=20]


11. (a) elaborate the objectives of operating system?

Or

(b) Draw the process state transition diagram and discuss.

12. (a) elaborate the operations performed on semaphore?

Or

(b) elaborate the necessary conditions for a deadlock to occur?Explain.

13. (a) discuss with an example, the fixed partitioned memory management scheme

Or

(b) describe any 2 placement algorithms.

14. (a) describe any 4 scheduling criteria.

Or

(b) Write a note on I/O buffering.

15. (a) Write the info elements of a file directory.

Or

(b) elaborate the 3 methods of record blocking? discuss.


PART C [12*5=60]

ans ALL ques..

16. (a) Describing the evolution of operating system.

Or

(b) discuss the role of process control block.

17. (a) discuss in detail about message passing mechanism.

Or

(b) discuss with an example, the method of avoiding deadlock.

18. (a) discuss with an example, the segmented memory management system.

Or

(b) discuss with an example, the virtual memory management system.

19. (a) discuss with an example, the different process scheduling methods.

Or

(b) discuss with an example, the different disk scheduling strategies.

20. (a) discuss with an example, the allocation methods in secondary storage.

Or

(b) define in detail, the architecture of file system

Earning:   Approval pending.