M.Sc. DEGREE EXAMINATION, APRIL/MAY 2018.
Second Semester
Electronics and Communications
OPERATING SYSTEM
(New CBCS Syllabus W.e.f. 2017-18)
2 1721324
Time 3 Hours Max. Marks 70
PART — A
(Short Answer Type Questions)
Answer any FIVE of following.
All questions carry equal marks. 6 30 Marks)
1. Explain the different layers of an operating system.
2. Define thread.
3. Explain the terms waiting time and response time.
4. Discuss race condition.
5. Explain principles of paging.
6. Describe file system architecture.
7. Discuss overlays.
8. Explain the access control lists.
PART — B
(Essay Type)
Answer ALL questions of following.
All questions carry equal marks. 10 40 Marks)
9. Describe microkernel operating system and briefly explain concept of Virtual
machine process management.
Or
Define the terms Process control block State Transition.

10. Explain Pre-emptive scheduling method and define waiting time and
response-time.
Or
What is inter-process communication and explain deadlock situation.
11. Discuss page allocation and explain paging protection and sharing.
Or
Write a short note on file system management. How do you access different
files and write the file operation?
12. Explain security environment and protection mechanisms.
Or
Discuss the role and function of kernel in an LINUX operating system and
write a few elementary LINUX commands.
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