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