Bharathidasan University 2008 M.C.A Computer Aplications - RQG211- Operating Systems - - - Dist Education - Question Paper

S. No 2555 RQG211

(For candidates admitted from 2006-2007 onwards)
MCA Degree Examination, April 2008
Computer Applications
OPERATING SYSTEMS
Time: 3 hours Maximum: 75 Marks

PART A (10 x two = 20 Marks)
ans ALL ques.
1. What is mapping function? elaborate its constraints?
2. elaborate the drawbacks of Direct Memory Access (DMA)?
3. State any 2 requirements of mutual exclusion
4. elaborate the elements of a semaphore?
5. State any 2 memory management techniques
6. What do you understand by the term logical address, relative address and physical address in memory location?
7. What does the term time slicing refers to in round robin scheduling policies?
8. elaborate the 3 techniques for performing I/O function??
9. What is the access control info available in a file directory?
10. elaborate the 3 methods of record blocking? State them

PART B (5 x five = 25 Marks)
ans ALL ques.
11. (a) elaborate the different registers available in a user visible register? discuss
or
(b) Draw and discuss briefly an instruction cycle with interrupts
12. (a) elaborate the reasons for process termination? discuss
or
(b) elaborate the design characteristics of message systems for inter-processor communication and synchronization?
13. (a) Write short notes on Transaction Lookaside Buffer (TLB)
or
(b) elaborate the requirements of memory management process? discuss
14. (a) Write short notes on FCFS scheduling policies
or
(b) elaborate the different types of I/O buffering? discuss
15. (a) elaborate the access rights available to a user of a file? discuss
or
(b) elaborate the 3 techniques used in disk allocation table? discuss

PART C (3 x 10 = 30 Marks)
ans Any 3 ques.
16. explain in detail the integrated deadlocks strategy
17. explain in detail the concept of thrashing
18. explain in detail the 4 kinds of scheduling
19. explain the different disk scheduling policies
20. explain the different file allocation methods in file management

Earning:   Approval pending.