B.Sc. DEGREE EXAMINATION, NOVEMBER 2017
Fifth Semester
Computer Science
OPERATING SYSTEM
(CBCS 2014 onwards)
Time 3 Hours Maximum 75 Marks
Part A (10 x 2 20)
Answer all questions.
1. What is Bootstrap Program?
2. What is DMA?
3. Draw the diagram of Process State.
4. Define: Throughput and Turnaround time.
5. What is Mutual Exclusion?
6. What is Circular Wait?
7. What is the difference between First Fit and Worst fit?
8. Write the concept of Copy-on-Write.
9. What is the difference between Shared lock and Exclusive
Lock?
10. What are Direct and Indirect Blocks?
Sub. Code
4BCE5C1
AFF-4562
2
Ws15
Part B 5 25)
Answer all questions by choosing either or
11. Write short notes on I/O Structure.
Or
Explain the functions provided by OS Services.
12. Explain about Operations on Processes.
Or
Write about Thread Scheduling.
13. Discuss about Critical Section Problem.
Or
Write about Dead Lack Characterization.
14. Discuss about Segmentation.
Or
Explain LRU Page replacement algorithm.
15. Explain about Acyclic Graph Directories.
Or
Write about Linked Allocation.
AFF-4562
3
Ws15
Part C x 10 30)
Answer any three questions.
16. Discuss in detail about Operating System Structures.
17. Write a detailed note on Inter Process Communication.
18. Explain in detail about Deadlock Detection and
Avoidance.
19. Discuss in detail about Paging.
20. Discuss in detail about Directory Structures.
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