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

Download JNTU Anantapur (JNTU Anantapur) Master of Computer Applications (MCA) 2016 May Supply 2nd Sem 9F00204 Operating Systems Previous Question Paper

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

Answer any FIVE questions
All questions carry equal marks
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1 (a) Define the essential properties of the following types of operating systems:
(i) Batch. (ii) Interactive. (iii) Multiprogramming.
(b) What are system calls? List out systems call types.

2 (a) Describe about scheduling criteria for comparing CPU scheduling algorithms.
(b) Describe:
(i) Shortest job first scheduling.
(ii) Priority scheduling.

3 (a) Describe in detail about mutual exclusion implementing with semaphores.
(b) Describe about classical problems of synchronization.

4 (a) Describe the working of paging.
(b) 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?

5 (a) Explain file access methods.
(b) Explain various directory structures.

6 (a) Explain about FCFS disk-scheduling algorithm.
(b) Explain about swap-space management.

7 (a) Explain the conditions for a deadlock to occur with example.
(b) Discuss deadlock prevention mechanisms.

8 (a) Explain about Access matrix Concept in the protection.
(b) Explain design principles of security.

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