Download JNTUH MCA 2nd Sem R09 2017 August F3202 Operating Systems Question Paper

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Code No: F3202 R09

JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD

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MCA I Semester Examinations, August - 2017

OPERATING SYSTEMS

Time: 3hrs Max.Marks:60

Answer any five questions

All questions carry equal marks

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1. a) Define Batch operating system and time sharing operating system, giving the essential properties of each of them.
   b) List and explain various layers of an operating system. [6+6]
2. a) Distinguish between user mode and kernel mode of operations in operating systems.
   b) List the difference between preemptive and non-preemptive scheduling. [6+6]
3. a) State the requirements that a solution to the critical section problem must satisfy.
   

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   b) What are the different principles which must be considered while selection of a scheduling algorithm? [6+6]
4. a) Why should page replacement be performed? Compare FIFO, Optimal and LRU page replacement algorithms with an example. [12]
5. a) What is segmentation? How it differ from paging?
   b) What is disk scheduling? Give SCAN disk scheduling algorithm. [6+6]
6. a) List and briefly discuss the most common schemes for defining the logical structure of a directory. [12]

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7. a) How does deadlock avoidance differ from deadlock prevention? Write about deadlock avoidance algorithm in detail. [12]
8. a) Why protection is required for a system? Explain the principles of protection.
   b) Illustrate the design principles of UNIX system. [6+6]

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