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LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034
B.C.A. DEGREE EXAMINATION – COMPUTER APPLICATIONS
FIFTH SEMESTER – NOVEMBER 2011
CA 5504 - OPERATING SYSTEM
Date : 31-10-2011
Time : 9:00 - 12:00
Dept. No.
Max. : 100 Marks
PART – A
Answer ALL Questions
(10 X 2=20)
1. Define Operating system?
2. What are system calls?
3. What is a process state and mention the various states of a process?
4. Define deadlock.
5. What is virtual memory?
6. Define lazy swapper.
7. Define spooling.
8. What is low-level
level formatting?
9. What is a file?
10. What are the operations that can be performed on a directory?
PART – B
Answer ALL Questions
(5 X 8=40)
11. (a) Explain the any three types of computer systems.
(OR)
(b)Write
b)Write about the various operations of system calls.
12. (a)Explain about inter-process
process communication.
(OR)
(b)Explain about the methods used to prevent deadlocks
13. (a)Explain
Explain virtual momory and any one of its mapping schemes.
(OR)
(b)Explain the basic concepts of segmentation.
14. (a)Explain about the principles of I/O software.
(OR)
(b)Write about the kernel I/O subsystem.
15. (a)What are files and explain the access methods for files?
(OR)
(b)Explain about the directories in detail.
PART – C
Answer TWO Questions
(2 X 20=40)
16. (a) Explain about the operating system structure in detail.
(b)Explain about the various CPU scheduling algorithms.
17. (a)Explain the various page replacement strategies.
(b)Explain the various disk scheduling techniques
18. (a) Discuss about the file system implementation in detail.
(b) Explain the features of Unix and windows.
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