东北大学软件学院操作系统BB习题

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1、-(whichfunctionisusedforstartingaprocess?A.wait()B.exec()C.exit()D.fork()

2、whichisnotoneofthemajordifferencesbetweenuser・levelthreadsA.Oneuser-levelthreadcanbeonlymappedbeonekernelthread・B.Userthreadsarescheduledbythethreadlibraryandthekernelscheduleskernelthreads.C.User-levelthreadsareunkno

3、wnbythekernel,whereasthekernelisawareofkernelthreads.D.Kernelthreadsneednotbeassociatedwithaprocesswhereaseveryuserthreadbelongstoaprocess.andkernel-levelthreads?operatingsystem,whichsturctureisusedforcontrollingandmanagingtheprocessexecutionA.interruptB.systemkernelc.semaphoreD.processcont

4、rolblock+?Whenaprocesschangesstate,whichofthefollowingconversionwillnotoccur?A.Running->ReadyB.Ready->RunningC.Waiting・>RunningD.Running-〉Waiting-

5、lftherearefiveprocessesinthesystem,howmanyprocessesatmostmaybeunderthewaitingstateatthesametime.A.0B.5C.4D.1・Whichoneofthefollowingsisnotamethod

6、forcommunicationbetweenprocesses.A.sharingmemoryB.messagebufferC.pipeD.semaphoreoperationswaitandsignalindirectcommunication,themessagesaresenttoandreceivedfromA.supplyB.chanelC.PipeD.mailboxichinformationisnotineludedinPCBA.pagesizeB.memoryaddressC.priorityD.processID+-joneprocessmayinelud

7、emanythreads.Whichoneofthefollowingsisnotoccupiedbyonlythread?A.threadcontrolblockB.stackC・memoryspaceD.CPU+-InbanchsystemjobschedulingprogramchoosesmultiplejobsfromthejobqueueandputthemintoA.externalstorageB.cacheC.memoryD.pool?*Thepurposeofreal-timeoperatingsystemisA.utilizationratioofthe

8、computersystemB.interactivityofthecomputersystemC.reliabilityofthecomputersystemD.increasespeedofsoftware+-Whichofthefollowingstatementisnottrueregardingsystemcalls?A.Systemcallsarefunctionsthatruninsystemmodeinadualmodesystem.B.Systemcallsarefunctionsdefinedaspartoftheoperatingsystems.C.Sy

9、stemcallsarefunctionsthatruninusermodeinadualmodesystem・D.Systemcallsareimplementedusingatrapinstructionwhichgeneratesaninterrupt.+]fhemainobjectiveoftimesharingsystemisA.quickresponseB.reducesystemcostC.highthroughoutD.fulluseofmemoryWhichoneiswrongwith