Osmania University (OU) 2011-4th Year B.E Computer Science and Engineering .2/ (cse) 2 semester(main) /e operating system - Question Paper
FACULTY OF ENGINEERING
B.E.2/4 YEAR (CSE) two SEMESTER(MAIN) exam MAY/JUNE 2011
OPERATING SYSTEM
*QUESTIONS OF ABOVE MENTIONED ques. PAPER ARE ATTACHED beneath PLEASE CHECK THEM OUT
Code No.: 3297
FACULTY OF ENGINEERING B.E. II/IV Year (CSE) II Semester (Main) Examination, May/June 2011
OPERATING SYSTEMS
Time: 3 Hours] [Max. Marks: 75
Answer all questions from Part A.
Answer any five questions from Part B.
Part A - (Marks : 25)
1. What is the advantage of the layered approach to design of operating systems? 2
2. What is the function of the Dispatcher in the CPU scheduling function? 3
3. What is the need for hierarchical paging in memory management. 2
4. What problems of contiguous allocation does the linked allocation method? Solve. 3
5. How are counting semaphores different from binary semaphores. 2
6. How is deadlock avoidance different from deadlock prevention? 3
7. What do you understand by Rotational latency"?-_------- 2
8. Differentiate between maskable and non-maskable interrupts. 2
9. What are the three main components of a LINUX system? 3
10. What is the use of plug-and-play manager in WINDOWS XP? 3
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Part B - (Marks : 50)
11. (a) Explain the importance of system calls and system programs. 5
(b) How do processes change their states, explain with suitable diagram. 5
12. (a) Why are segmentation and paging sometimes combined into one scheme? Explain with
suitable diagram. '
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(b) Consider a system that supports the strategies of contiguous, linked and indexed allocation. What criteria should be used in deciding which strategy is best utilized for a particular file? . 6
13. (a) Briefly explain the use of monitors in solving the dining - philosopher problem. 7
(b) Wliat are the different ways of preventing deadlocks? [PT O
14. (a) How is the improvement in reliability and performance achieved by including RAID
structures? Explain.
4
(b) Explain the life cycle of a blocking read request to show the various steps required for an I/O operation.
6
15. (a) How does the Linux Kernel handle different types of flies? Explain. 4
(b) Briefly explain the different layers in the architecture of Windows XP. 6
16. (a) Bring out the importance of the different types of schedulers in proper scheduling of
processes for higher performance. 5
(b) What are the different ways of recovery from deadlock? What factors determine which process should be chosen? '
17. Write short notes on any two : (5 ' 2 = 10)
(a) Various page replacement algorithms.
(b) Implementation of Access Matrix using capability lists.
_ (c) Dynamic linking of libraries in LINUX system.
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