| CS-262 Operating Syseems (B.Tech 4rd Semester, 2052) 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 : 2 Each 1 (a) Why do we need Real Time O.S. ? (b) Define the term Network Structure. (c) Nmae any four components of O.S. (d) Differentiate betwwen MFT and MVT contiguous allocation methods. (e) Define the term Process and PCB. (f) What is Swapping and its disadwantages.? (g) What is Spooling ? How is it different from Buffering ? (h) Nmae various CPU Scheduling Criterias. (i) How is the O.S. of main frame is different from O.S. of Personal Computers? (j) What is the main advantage of using deadlock detection over prevention of avoidance ? Section-B Marks:5 Each 2. Differentiate betwwen the following: (a) Logical and Physical Address (b) Logic term and Medium term scheduler 3. Describe security mechanism used in UNIX O.S. 4. Describe deadlocks using resourse allocation graph. How can it be avoided ? 5. Compare and contrast distributed O.S. with nondistributed O.S. 6. Compare various CPU scheduling algrothims with reference to Turn Around and Waiting Time with the help of example. Section-C Marks : 10 Each 7. (a) Consider the following page referance string: 1,2,3,4,2,1,5,6,2,1,2,3,7,6,3,2,1,2. How many page faults would accur for LRU and FIFO algorithms ? Assume four frames. (b) Define Compaction and its significance. 8. (a) Explain Paging Memory Menagement Tech. with the help of block diagram. (b) Discuss various various types of directory structures. 9. Write short notes on any two of the following : (a) Window NT features. (b) System Calls and Program Structure (d) Batch and time sharing O.S. |
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