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Total No. of Questions : 11
[Total No. of Printed Pages : 3
EW-4
M.C.A. 1st Semester (New)
Examination, 2021-22
Operating System
Paper - MCA - 104
Time : 3 Hours]
[Maximum Marks : 60
Note :-Attempt all question.
Short answer type questions : (any five)
5×2=10
1.
Define operating system. Also discuss various functions performed by it.
2.
Describe preemptive & non preemptive scheduling.
3.
Define semaphores.
4.
What are method of deadlock prevention?
5.
Describe paging. Discuss its principle of operation.
6.
Describe disk scheduling.
Long answer type questions : -
5×10=50
1.
Define system cells. Enlist the steps performed when a system call is executed.
OR
Explain multiprogramming with example.
2.
Suppose that there are 4 jobs requiring a time of 15 units, 6 units and 12 units. If the time slice is 3 units then calculate the turn arround time of each job. Assume that all the jobs arrive at the same time and have the same priority.
OR
Explain preemptive & non preemptive scheduling with any one scheduling example.
3.
Give the algorithm for deadlock detection. Also discuss the methods for deadlock recovery.
OR
4.
What do you mean by segmentation? Give a comparison between segmentation and paging.
OR
Name the various page replacement algorithm and explain any one of them in detail.
5.
Explain the following:-
- SCAN
- DMA
OR
Describe the selection criteria of a disk scheduling algorithm.