东北大学软件学院操作系统BB习题

Whichfunctionisusedforstartingaprocess?A.wait()B.exec()C.exit()D.fork()Whichisnotoneofthemajordifferencesbetweenuser-levelthreadsandkernel-levelthreads?A.Oneuser-levelthreadcanbeonlymappedbeonekernelthread.B.Userthreadsarescheduledbythethreadlibraryandthekernelscheduleskernelthreads.C.User-levelthreadsareunknownbythekernel,whereasthekernelisawareofkernelthreads.D.Kernelthreadsneednotbeassociatedwithaprocesswhereaseveryuserthreadbelongstoaprocess.-*Inoperatingsystem,whichsturctureisusedforcontrollingandmanagingtheprocessexecutionA.interruptB.systemkernelC.semaphoreD.processcontrolblock+Whenaprocesschangesstate,whichofthefollowingconversionwillnotoccurA.Running->ReadyB.Ready->RunningC.Waiting->RunningD.Running->Waiting-*Iftherearefiveprocessesinthesystem,howmanyprocessesatmostmaybeunderthewaitingstateatthesametime.A.0B.5C.4D.1hichoneofthefollowingsisnotamethodforcommunicationbetweenprocesses.A.sharingmemoryB.messagebufferC.pipeD.semaphoreoperationswaitandsignalWithindirectcommunication,themessagesaresenttoandreceivedfromA.supplyB.chanelC.pipeD.mailbox-*WhichinformationisnotincludedinPCBA.pagesizeB.memoryaddressC.priorityD.processID+-*。neprocessmayincludemanythreads.Whichoneofthefollowingsisnotoccupiedbyonlythread?A.threadcontrolblockB.stackC.memoryspaceD.CPU+-Inbanchsystem,jobschedulingprogramchoosesmultiplejobsfromthejobqueueandputthemintoA.externalstorageB.cacheC.memoryD.pool?*Thepurposeofreal-timeoperatingsystemisA.utilizationratioofthecomputersystemB.interactivityofthecomputersystemC.reliabilityofthecomputersystemD.increasespeedofsoftwareA.Systemcallsarefunctionsthatruninsystemmodeinadualmodesystem.B.Systemcallsarefunctionsdefinedaspartoftheoperatingsystems.C.Systemcallsarefunctionsthatruninusermodeinadualmodesystem.D.Systemcallsareimplementedusingatrapinstructionwhichgeneratesaninterrupt.hichofthefollowingstatementisnottrueregardingsystemcalls?+*ThemainobjectiveoftimesharingsystemisA.quickresponseB.reducesystemcostC.highthroughoutD.fulluseofmemoryWhichoneiswr...