Operating System Msc IT 2 Semester/Term University Of Sargodha (UOS) 2018
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Paper text
University of Sargodha
M.S. 2* Term Examlanton 2018
Sublest: LT Zaper Operating fratem (CMP06LD
Time Allowed: 2:30 Hours
Maximsor Marker 3e
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Objective Part
(Compulsory)
war the rollawing questions in 2-5 lines.
Define Context Switch
3.
How can differentiate interrupt (pad 7). CO/Ping 2 marke mach
4.
Deine Roll in & Roll out with Sor
anat is the purpose of "stub?
5.
6.
What Is the difference between procoss and thread
What is a ready queue?
7. What is Clustered Systems
What is system call?
9.
What do you mean by a busy watting semaphore or spinocho d
10. What is the purpose of compaction?.
11. Differentiate between Entry Section and Reminder Section.
12, name the techniques to manage free space
13. What.are the three different stages/times when the addresses can be be
14. What are the Benefit of virtual memory
15. What is a deadlock?
16. Discuss the difference symmetric and asymmetrio multiprocussing.
(15x2-32)
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I to in
Subjective Part
Note: Attempt any four Questiona. All carry equai marks
[12x4-48]
Q.No.2 Define Monitor. Describe the structure of a monitor?
b) Describe Scan and C-Scan disk scheduling technique?'
Q.No.3.
a) Define PCB with all of its components
b) Briefly explain the Operating ayatam servienn
Q.No,4 This is a string of memory page references: 4, 3, 2,1, 5, 1, 2, 3, 2, 3, 4, 5, 5, 5
Draw diagrams showing the frame usage at each memory references for each of the following page
replacement algorithms. Also give the number of page faults generated by eäch algorithm FIFO, LRU, LPU.
Assume the system uses pure demand paging and starts with no pages in real memory. There are thre
frames of real memory.
Q.No.5
a) What are fig System Calls. Explain Windows and Unix System Calls with Examples.
b) What ing@erating system? Explain the structure of operating system with the neip of diagram.
fat are the four necessary conditions to peo@deadlock?
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