Download JNTUA MCA 2016 May Supply 2nd Sem 9F00204 Operating Systems Question Paper

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Code: 9F00204

MCA II Semester Regular & Supplementary Examinations May 2016

OPERATING SYSTEMS

(For students admitted in 2010, 2011, 2012, 2013, 2014 & 2015 only)

Time: 3 hours Max. Marks: 60

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Answer any FIVE questions

All questions carry equal marks

1. Define the essential properties of the following types of operating systems:
   (i) Batch. (ii) Interactive. (iii) Multiprogramming.
2. What are system calls? List out systems call types.

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3. Describe about scheduling criteria for comparing CPU scheduling algorithms.
4. Describe:
   (i) Shortest job first scheduling.
   (ii) Priority scheduling.
5. Describe in detail about mutual exclusion implementing with semaphores.

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6. Describe about classical problems of synchronization.
7. Describe the working of paging.
8. Consider the following reference string:
   1,2,3,4, 2,1,5,6, 2,1,2,3, 7,6;3,2, 1,2,3,6
   How many page faults are there for FIFO and LRU algorithms with 4 frames?

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9. Explain file access methods.
10. Explain various directory structures.
11. Explain about FCFS disk-scheduling algorithm.
12. Explain about swap-space management.
13. Explain the conditions for a deadlock to occur with example.

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14. Discuss deadlock prevention mechanisms.
15. Explain about Access matrix Concept in the protection.
16. Explain design principles of security.

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