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Posted By: kishore Member Level: Gold Posted Date: 24 May 2008
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2007 Jawaharlal Nehru Technological University M.C.A Computer Aplications OPERATING SYSTEMS Question paper
1.a) Describe the differences between symmetric and asymmetric
multiprocessing. What are the advantages and disadvantages of
multiprocessor systems?
b) List five services provided by an operating systems. Explain how
each provides convenience to the user.
2.a) Explain real time scheduling.
b) How cooperating processes can communicate in a shared memory
environment?
3.a) What are the difficulties encountered in process scheduling when
multiple CPU’s are available? Describe one scheduling algorithm.
b) Describe “Address binding” and “Swapping” mechanisms of an OS.
4.a) Describe a Demand Paging system.
b) What are the considerations for selection of a page replacement
algorithm?
c) What is thrashing? What are the causes for thrashing? Name the
page replacement algorithms that can limit the effects of thrashing.
5.a) Describe methodologies for file system protection.
b) How to allocate space to the files so that disk space is utilized
effectively? Name the methods and give their relative advantages
and disadvantages.
6.a) What are monitors? How monitors be used for synchronization
problems?
b) What is the Readers-writers problems? How semaphores be useful
for the solution?
7.a) Describe features that characterize deadlocks. Name different ways
of dealing with the deadlock problems.
b) Describe a methodology for avoiding deadlocks.
8. Write a short notes on the following:
a) Critical section problem b) Recovery from deadlocks
c) Deadlock detection.
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