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LOYOLA COLLEGE (AUTONOMOUS), CHENNAI 600 034
M.C.A.DEGREE EXAMINATION COMPUTER APPLICATIONS
SECONDSEMESTER APRIL 2018
CA 2807- OPERATING SYSTEMS
Date: 25-04-2018 Dept. No. Max. 100 Marks
Time: 01:00-04:00
PART A
Answer ALL questions 10* 2 20
1. Define Operating system.
2. Write UNIX command used for Networking.
3. Write the syntax fordo-while loop in shell programming
4. Distinguish between open and creat functions?
5. What is the use of fork function?
6. What are the methods for Deadlock avoidance?
7. Define Thread.
8. Draw the Process state transition diagram.
9. What is Throughput?
10. Write any four basic socket functions
PART B
Answer ALL questions 8 40
11. Explain file access permissions in UNIX.

Explain if-else statement in Shell programming with an example
12. Discuss File Sharing in UNIX.

Explain different types of buffering in UNIX.
13. Explain the concept of FIFO for Inter-Process Communication.

Write short notes on the following
Password file ii) Group File
14. Explain Single contiguous allocation of memory

Discuss the Non-preemptive Scheduling policies in detail.
15. Write short notes on Raw sockets

Discuss OSI reference model in detail.
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PART C
Answer any TWO questions 2 20 40
16. Explain the Architecture of UNIX operating system with a neat diagram.
Discuss the different File types in detail
17. Discuss the concept of thread synchronization with an example.
Discuss the concept of Paging in detail
18. Discuss all the functions of TCP sockets 20 Marks