Operating System Mcqs

Page No. 104

Which is not a major component of a file system?


aDirectory service


bAuthorization service


c Shadow service


dSystem service


View Answer Shadow service

What are the different ways file accesses take place?


asequential access


bdirect access


cindexed sequential access


dall of the mentioned


View Answer all of the mentioned

What are characteristic of a DFS?


aFault tolerance


bScalability


cHeterogeneity of the system


dUpgradation


View Answer Upgradation

What are not the characteristics of a DFS?


alogin transparency and access transparency


bFiles need not contain information about their physical location


cNo Multiplicity of users


dNo Multiplicity if files



What are the different ways in which clients and servers are dispersed across machines?


aServers may not run on dedicated machines


bServers and clients can be on same machines


cDistribution cannot be interposed between a OS and the file system


dOS cannot be distributed with the file system a part of that distribution



What are non characteristics of session semantics?


a Each client obtains a working copy from the server


bWhen file is closed, the modified file is copied to the file server


cThe burden of coordinating file sharing is ignored by the system


dEasy to implement in a single processor system



What are the characteristics of transaction semantics?


aSuitable for applications that are concerned about coherence of data


bThe users of this model are interested in the atomicity property for their transaction


cEasy to implement in a single processor system


dWrite-back enhances access performance



What are the characteristics of Unix semantics?


aEasy to implement in a single processor system


bData cached on a per process basis using write through case control


cWrite-back enhances access performance


dAll of the mentioned


View Answer All of the mentioned

What are the three popular semantic modes?


aUnix, Coherent & Session semantics


bUnix, Transaction & Session semantics


cCoherent, Transaction & Session semantics


dSession, Coherent semantics



What is the coherency of replicated data?


aAll replicas are identical at all times


bReplicas are perceived as identical only at some points in time


cUsers always read the most recent data in the replicas


dAll of the mentioned


View Answer All of the mentioned

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