Download JNTUH MCA 3rd Sem R15 2018 January 823AA Operating Systems Question Paper

Download JNTUH (Jawaharlal nehru technological university) MCA (Master of Computer Applications) 3rd Sem (Third Semester) Regulation-R15 2018 January 823AA Operating Systems Previous Question Paper


R15

Code No: 823AA















JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY HYDERABAD

MCA III Semester Examinations, January ? 2018

OPERATING SYSTEMS

Time: 3hrs













Max.Marks:75


Note: This question paper contains two parts A and B.

Part A is compulsory which carries 25 marks. Answer all questions in Part A. Part B
consists of 5 Units. Answer any one full question from each unit. Each question carries 10
marks and may have a, b, c as sub questions.



PART - A



















5 ? 5 Marks = 25

1.a) What are the different types of System Calls.









[5]

b) Discuss about the activities that happen during context switching?



[5]

c) What is thrashing?















[5]

d) Explain about swap space management.











[5]



e) Discuss about access control.













[5]



PART - B

















5 ? 10 Marks = 50

2.

What is the need of operating system? Explain its functionalities.



[10]

OR

3.

Explain about operating system design and implementation.





[10]



4.

What is Critical Section Problem? Discuss about Peterson's solution.



[10]

OR

5.

What is Process? Explain about process control block.







[10]


6.

Explain first fit, worst fit and best fit allocation algorithms with examples.

[10]

OR

7.

Explain about MFT and MVT.













[10]


8. What is a Directory? Write short note on Directory implementation.



[10]

OR

9.

Suppose the head of a moving head disk with 200 tracks, numbered 0 to 199, is currently
serving a request at track 123 and has just finished a request at track 125.If the queue of
Requests is kept in FIFO order: 126, 17, 91, 107, 194, 150, 102, 105, 130, 12. What is the
total head movement to satisfy these requests for the following disk scheduling algorithms?

(a) FCFS b) SSTF c) SCAN













[10]


10.

Explain about capability based system.











[10]

OR

11.

Write and explain deadlock avoidance algorithm.







[10]



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This post was last modified on 17 March 2023