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Compaq Placement Papers 

->Why paging is used ?

->Which is the best page replacement algo and Why ?

->What is software life cycle ?

->How much time is spent usually in each phases and why ?

->What is testing ?

->Which are the different types of testing ?

->Which are the different phases in Software life cycle (asked again)

->Why is analysis and testing phases very important ?

->Why networks are layered ? What is the advantage of that ?

->How many layers are there in OSI ? Why is it called OSI model ?

->network topologies ?

->Which are the different network toplogies ?

->an example of bus type network.

->What is the Bandwidth of ethernet ?

->Explain the advantage and disadvantage of ethernet ?

->Which is the protocol used in ethernet. (CSMA/CD) Why is it called so ?

->What is the advantage of Ring network ?

->Compare it with ethernet.

->What is inheritance, encapsulation etc.

->If there are too many page faults what is the problem?

->To ensure one pgm. doesnt corrupt other pgm. in a Multi-pgm. enviornment what you should do?

->Which one you will use to implement critical section? Binary Semaphore

-> Which one is not needed for Multi-pgm. enviornment?

options are: virtual memory, security, time sharing, none of the above.

->Which one is not done by Data link layer ? bit stuffing, LRC,CRC,parity check

-> Which one is not related to Data link layer?

-> Which one is not suitable for client-server application?

options are tcp/ip, message passing, rpc, none of theabove.

->Term stickily bit is related to
a)kernel b)undeletable file c) d)none

->semaphore variable is different from ordinary variable by ?

->unix system is

a)multi processing

b)multi processing ,multiuser

c)multi processing ,multiuser, multitasking


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