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Posted By: Sriram Member Level: Diamond Posted Date: 13 Jun 2008
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2006 Andhra Pradesh State Jawaharlal Nehru Technological University B.Tech OPERATING SYSTEMS Set No. 4 Question paper
Code No: RR410401 Set No. 4
IV B.Tech I Semester Regular Examinations, November 2006
OPERATING SYSTEMS
(Electronics & Communication Engineering)
Time: 3 hours Max Marks: 80
Answer any FIVE Questions
All Questions carry equal marks
? ? ? ? ?
1. With the help of neat block diagram, describe the computer components with an
example [16]
2. (a) Explain the reasons for process terminations.
(b) Describe the single blocked queue and multiple blocked queues with an exam-
ple. [4+12]
3. Show that monitors and semaphores have equivalent functionality by
(a) Implementing a monitor using semaphores
(b) Implementing a semaphore using monitors [8+8]
4. Explain all the strategies involved in deadlock detection and how it is recovered.
[8+8]
5. (a) Enumerate the reasons for allowing two or more processes to, all have access
to particular region of memory.
(b) In a fixed partitioning scheme, what are the advantages of using unequal size
partitions?
(c) What is the difference between internal and external fragmentation?
(d) What are the distinctions among logical, relative and physical addresses?
[4+4+4+4]
6. (a) Explain in detail about disk cache performance using frequency based replace-
ment.
(b) The following equation was suggested both for cache memory and disk cache
memory
TS = TC +M TD
Generalize this equation to a memory hierarachy with N levels instead of just
two levels [8+8]
7. (a) What do you understand by a file directory?
(b) Explain briefly the information elements of a file directory
(c) Explain what is tree-structured directory? [5+5+6]
8. What do you understand by Trusted systems? Draw a figure of reference monitor
concept and explain. [5+5+6]
? ? ? ? ?
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