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Operating Systems Question Paper - May 18 - Electronics And Telecomm (Semester 6) - Mumbai University (MU)
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Operating Systems - May 18
Electronics And Telecomm (Semester 6)
Total marks: 80
Total time: 3 Hours
INSTRUCTIONS
(1) Question 1 is compulsory.
(2) Attempt any three from the remaining questions.
(3) Draw neat diagrams wherever necessary.
Q1
a)
What is OS? Explain different functions of OS.
(5 marks)
00
b)
Explain critical section problem.
(5 marks)
00
c)
Expalin the concept of segmentation.
(5 marks)
00
d)
What are the characterstics of a Real Time OS?
(5 marks)
00
Q2
a)
Explain the process transition diagram for UNIX OS.
(10 marks)
00
b)
Consider the follwoing set of processes with CPU brust time given in milliseconds.
(10 marks)
00
| Process | Brust time | Arrival time |
|---|---|---|
| P1 | 10 | 1 |
| P2 | 4 | 2 |
| P3 | 5 | 3 |
| P4 | 3 | 4 |
Draw Gantt chart for FCFS and shortest Remaining Time First (SRTF) and calculate average waiting time and average turnaround time.
Q3
a)
What is a deadlock? explain the necessary and sufficient conditions for the deadlock.
(10 marks)
00
b)
Describe process management in LINUX.
(10 marks)
00
Q4
a)
Expalin the working of EDF and RMA realtime scheduling algorithms.
(10 marks)
00
b)
Calculate page hit and page miss for the following string using page replacement policies FIFO and LRU. Page frame size is 3.
(10 marks)
00
2,3,4,2,1,3,7,5,4,3,2,3,1
Q5
a)
Explain RIAD with different levels.
(10 marks)
00
b)
Explain how UNIX performs file management using I-nodes.
(10 marks)
00
Q6
a)
What are system calls? Explain any five system calls.
(10 marks)
00
b)
What is a semaphore? Give an implementation of bounded buffer producer consumer problem using semaphore.
(10 marks)
00
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