DISTANCE EDUCATION
M.Sc. (Computer Science) DEGREE EXAMINATION,
MAY 2018.
OPERATING SYSTEMS
(2007 onwards)
Time Three hours Maximum 100 marks
SECTION A — (10 × 3 30 marks)
Answer ALL the questions.
1. Define Operating System and write any four functions of
Operating System.
2. Write a short note on System Calls.
3. What is a process? List out the components of a process.
4. Define: Semaphores.
5. Write a short on Contiguous Memory Allocation.
6. What is meant by Swapping?
7. Differentiate Segmentation and Paging.
8. Define: Recovery.
9. Write about Stateless Services.
10. Write a short note on Atomicity.
Sub. Code
25
DE-3898
2
wk11
SECTION B — × 10 40 marks)
Answer any FOUR questions only.
11. Write a detailed note on Clustered and Handheld
Systems.
12. Explain the concept of deadlock prevention with example.
13. List and explain the four circumstances under which the
decisions for CPU scheduling takes place.
14. Explain about I/O mapped memory.
15. Define Paging. Explain various Techniques for
Structuring the Page Table in Detail.
16. What is a File? List out some file types with their
Corresponding Extensions and its usage.
SECTION C — × 15 30 marks)
Answer any TWO questions only.
17. Explain different types of Scheduling Algorithms with
neat example.
18. Explain Free Space Management (FSM).
Explain: Disk Scheduling.
19. Explain any two methods of Accessing Files.
Explain the various ways of improving the
Reliability and performance of File Systems.