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Posted Date: 18 May 2008 Posted By: Sree.... Member Level: Diamond
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2006 Andhra Pradesh State Jawaharlal Nehru Technological University, Hyderabad B.Tech OPERATING SYSTEMS Set No. 3 Question paper
Code No: RR221201 Set No. 3
II B.Tech II Semester Supplementary Examinations, Aug/Sep 2006
OPERATING SYSTEMS
( Common to Information Technology and Computer Science & Systems
Engineering)
Time: 3 hours Max Marks: 80
Answer any FIVE Questions
All Questions carry equal marks
? ? ? ? ?
1. (a) Explain the Operating system as Resource Manager.
(b) A major operating system will evolve over time for a number of reasons. What
are they? [4+12]
2. Discuss the attributes of the process. Describe the typical elements of process
control Block. [6+10]
3. What are the requirements for mutual exclusion? Explain them in detail. [8+8]
4. Give the conditions for deadlock and explain the methods of preventing deadlock.
[8+8]
5. (a) Discuss the differences between a pure paging and pure segmentation virtual
memory systems. What are the pros and cons of each scheme?
(b) What are the three main issues of implementing a virtual memory system?
(c) Comment on the relative merits of using a local versus a global page replace-
ment policy. [6+5+5]
6. (a) Which type of process is generally favoured by a multi-level feed back queuing
scheduler, a processor bound process or an I/O bound process? Briefly explain
why?
(b) Consider a variation of round-robin that we will call priority round-robin. In
priority round-robin each process has a priority in the range of 1 to 10. When
a process is given a time slice the length of quantum is basic constant (say
50 ms) times the priority of the job. Compare this system with an ordinary
priority system. [8+8]
7. (a) Explain in detail the four terms field, record, file and database with respect
to files.
(b) List the objectives and the requirements for a file management system. [8+8]
8. (a) How resources of a computer system protected?
(b) Explain user-oriented access control.
(c) Explain data-oriented access control. [5+6+5]
? ? ? ? ?
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