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Question Paper Code 55311
B.E/B.Tech. DEGREE EXAMINATION, NOVEMBER/DECEMBER 2011
Seventh Semester
Electrical and Electronics Engineering
CS 2411 OPERATING SYSTEMS
(Common to Electronics and Instrumentation Engineering and Instrumentation and Control Engineering)
(Regulation 2008)
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Part A - (10 x 2 = 20 marks)
1. Define Operating System
2. What are the advantages of cooperating processes?
3. What is meant by a system cal?
4. Define monitor. What does it consist of?
5. What are the disadvantages of single contiguous memory allocation?
6. What is demand paging?
7. Mention any four file attributes
8. Differentiate absolute path from relative path.
9. what are seek time and rotational latency?
PART - B (5 x 16=80 marks)
11. (a) Explain briefly about Inter Process Communication (16)
Or
(b) Describe the following,
(i) Virtual machine (6)
(ii) Process state (4)
(iii) Process control block (6)
12. (a) Write about FCFS Scheduling and Round Robin Scheduling. (16)
Or
(b) How does deadlock avoidance differ from deadlock prevention? Write about deadlock avoidance algorithm in detail. (16)
13. (a) Explain Segmentation with paging. (16)
Or
b) Why should page replacement be performed? Compare FIFO, Optimal and LRU page replacement algorithms, with an example of your choice? (16)
14. (a) Briefly explain about Directory structure. (16)
Or
(b) Explain free space management. (16)
15. (a) Write about table storage and tertiary storage. (16)
Or
(b). (i) List out the characteristics of I/O devices (6)
(ii) With neat sketch explain PC bus structure. (10)
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