| Operating System |
| PAPER NO. 3 |
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| PUT ON: 13th june, 2K3. |
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CS-262 Operating System (B.Tech 4th Semester,2063) Time : 3 Hours Maximum Marks : 60 NOTE:- This paper consist of Three Sections. Section A is compulsory. Do any Four questions from Section B and any two questions from Section C Section-A Marks : 20 1(a) What are the main components of an Operating System? (b) Define the need of Medium Term Scheduler. (c) What is non-preemption ? (d) Differentiate between Dispacher and Scheduler. (e) Why do we need Multilevel Paging ? (f) Name various methods for dealing with deadlocks. (g) What is the utility of Distributed Operating System.? (h) Why paging scheme is more suitable than MVT contiguos memory allocation? (i) What is the difference between a Trap and Interrupt ? (j) Name the file systems of Windows-NT, UNIX and DOS. Section-B Marks:5 Each 2. Compare and contrast the main features of Windows-NT and UNIX. 3. Given 3 page frames, use: (i) FIFO and (b) OPT to compute the number of page faults for the following reference string: F A B C A D A E C D A D C B C A. 4. Differentiate between the following: (a) Time Sharing and Real Time O.S. (b) Batch O.S. and Distributed O.S. 5. Name four necessary conditions for a deadlock to oddur and describe in brief the Banker's algrothim. 6. Draw a process Diagram using 5 states and explain interpretation of each transition. Section-C Marks : 10 Each 7. Why do we need Memory Management? Explain in detail the segmentation technique with block diagram. 8. (a) Discuss in brief the UNIX directory structure. (b) Describe the security model of Windows-NT. 9. Write short notes on any two of the following : (a) System calls and program Structure. (b) Virtual Memory Management (C) Condition policies in Distributed O.S. |
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