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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. 2 Question paper
Code No: RR410401 Set No. 2
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. (a) Describe the basic instruction cycle with example.
(b) What is an Interrupt? Describe the different types of interrupts. [8+8]
2. (a) Explain the role of process control block in OS.
(b) Differentiate the following
i. Process Switching vs Context Switching
ii. Clock interrupt Vs I/O interrupt. [8+8]
3. Explain in detail the message addressing and message format with an example.
[5+5+6]
4. How the problem among dining philosophers can be resolved? Suggest a suitable
algorithm. [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) What are preemptive and non-preemptive scheduling?
(b) Discuss about preemptive scheduling policies. [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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