LOYOLA COLLEGE (AUTONOMOUS), CHENNAI – 600 034

B.Sc. DEGREE EXAMINATION – COMPUTER SCIENCE

NA 12

FIFTH SEMESTER – November 2008

CS 5501 – OPERATING SYSTEM

 

 

 

Date : 03-11-08                     Dept. No.                                        Max. : 100 Marks

Time : 9:00 – 12:00

PART A                                                         (10×2=20 marks)

 

 

Answer ALL Questions

 

1. Define Process
2. What are the functions of an Operating System?
3. Explain the need for Compaction.
4. What is thrashing?
5. State the steps performed in P(S) operation with respect to semaphores
6. What is CPU headway?
7. What is blocking with respect to file systems?
8. Explain Dedicated devices.
9. What are the functions of the I/O Scheduler?
10. What is access control?

 

PART B                                                        (5×8=40 marks)

 

Answer ALL Questions

 

11. a) Explain the different states of a process and their transitions.
    (OR)
    b)  Explain the different types of Interrupts.
12. a) Define Deadlock. Explain in brief, how to prevent deadlock?
    (OR)
    b)  Compare any two scheduling algorithms with an example
13. a) What is a page fault? How it is handled by Operating System?
                                     (OR)
    b)  Compare any two page replacement algorithms
        
14. a) Explain SPOOLING
    (OR)
    b)  Explain management of Channels with respect to I/O devices

 

15. a) Explain the hierarchical organization of file systems
    (OR)
    b)  Explain the System calls related to Directory systems.

PART C                                            (2×20=40 marks)

 

Answer any TWO Questions

 

16. a) Explain Partitioned allocation with respect to memory.
    b)  Explain any two Page Replacement algorithms.
17. a) Explain Process Synchronization mechanisms.
    b)  What is deadly embrace? How can it be resolved?
18. a) Explain any two techniques of device management.
    b)  What are the different methods of File organization

 

 

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