Jawaharlal Nehru Technological University Hyderabad 2007 M.C.A Computer Aplications OPERATING SYSTEMS - Question Paper

1.a) define the differences ranging from symmetric and asymmetric
multiprocessing. elaborate the advantages and disadvantages of
multiprocessor systems?
b) List 5 services given by an operating systems. discuss how
every provides convenience to the user.
2.a) discuss real time scheduling.
b) How cooperating processes can communicate in a shared memory
environment?
3.a) elaborate the difficulties encountered in process scheduling when
multiple CPU’s are available? define 1 scheduling algorithm.
b) define “Address binding” and “Swapping” mechanisms of an OS.
4.a) define a Demand Paging system.
b) elaborate the considerations for selection of a page replacement
algorithm?
c) What is thrashing? elaborate the causes for thrashing? Name the
page replacement algorithms that can limit the effects of thrashing.
5.a) define methodologies for file system protection.
b) How to allocate space to the files so that disk space is utilized
effectively? Name the methods and provide their relative advantages
and disadvantages.
6.a) elaborate monitors? How monitors be used for synchronization
problems?
b) What is the Readers-writers problems? How semaphores be useful
for the solution?
7.a) define features that characterize deadlocks. Name various ways
of dealing with the deadlock issues.
b) define a methodology for avoiding deadlocks.
8. Write a short notes on the following:
a) Critical part issue b) Recovery from deadlocks
c) Deadlock detection.

Earning:   Approval pending.