previous question papers

1. Code: 9D55105
M.Tech I Semester Supplementary Examinations September/October 2015
OPERATING SYSTEMS
(Embedded Systems)
(For students admitted in 2011, 2012, 2013 & 2014 only)
Time: 3 hours Max. Marks: 60
Answer any FIVE questions
All questions carry equal marks
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1 (a) Describe the stages in the evolution of an operating system in brief.
(b) Describe the goals and functions of an operating system.
2 (a) Discuss various process states and their meaning in detail.
(b) What is a race condition? Illustrate it with an example why is the presence of race condition
considered as bad design.
3 (a) What kind of fragmentations do the following memory management schemes have? In each case
justify your answer: (i) Paging. (ii) Segmentation. (iii) Paged segmentation.
(b) What are the main issues in managing the main memory?
4 (a) Describe various disk space allocation strategies with their merits/demerits.
(b) How do the data management system and the operating system communicate to achieve data
access for an online query?
5 (a) What is I/O scheduler? How is it relevant to operating system? Explain.
(b) Explain in detail the required data structures to perform the path management.
6 (a) Discuss in brief threats to security in any computing environment.
(b) Discuss how security violation can take place due to different ways of passing of the parameters.
7 (a) How is process management achieved in UNIX?
(b) How does UNIX provide file protection? Examine this method with its merits / demerits.
8 (a) Read & write system calls in UNIX provides random access for particular file. Justify.
(b) Discuss the booting process of UNIX operating system.
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