MODEL PAPER

B. Tech (IT) Degree Examination

Third Year - First Semester

OPERATING SYSTEMS

Effective from the admitted batch of 2004-2005

Time: 3 hrs
Max Marks: 70

First Question is Compulsory

Answer any four from the remaining questions

All Questions carry equal marks

Answer all parts of any question at one place

1. Briefly explain the following (7x2=14)
a. Client-Server model of Computing
b. Preemptive scheduling
c. User level threads
d. Thrashing
e. Device drivers
f. Fork svsteni call
g. Asynchronous I/O

2. a. Discuss the role of operating system as a resource manager.
b. Explain the concept of virtual machine

3. a. Write and explain monitor solution for producer - consumer problem (10)
b. Explain the role of size of time quantum on round robin scheduling w.rt. response time. (4)

4. a. Explain about swapping and swapping overheads. (4)
b. Discuss how paged segmentation is implemented. (10)

5. a. Explain how access control lists and capability lists are used as a means of protection. (6)
b. Explain different file allocation methods. (8)

6. a. Explain about different disk scheduling algorithms. (7)
b. Explain about deadlock detection and recovery. (7)

7. a. Explain Unix file system implementation. (10)
b. Explain the difference between character and block devices. (4)

8. a. Briefly explain about process management in MS-DOS. (8)
b. Explain about different directory structures. (6)

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