Chapter 1 – Computer Systems Overview Q&A

《Chapter 1 – Computer Systems Overview Q&A》由会员上传分享，免费在线阅读，更多相关内容在教育资源-天天文库。

1、OperatingSystemsChapter1–ComputerSystemsOverviewChapter1–ComputerSystemsOverviewTrue/FalseQuestions:1.T/F–Theoperatingsystemactsasaninterfacebetweenthecomputerhardwareandthehumanuser.ANS:T2.T/F–Oneoftheprocessor’smainfunctionsistoexchangedatawithmemory.ANS

2、:T3.T/F–User-visibleregistersaretypicallyaccessibletosystemprogramsbutarenottypicallyavailabletoapplicationprograms.ANS:F(typicallyavailabletoallprograms)4.T/F–Dataregistersaregeneralpurposeinnature,butmayberestrictedtospecifictaskssuchasperformingfloating

3、-pointoperations.ANS:T5.T/F–TheProgramStatusWordcontainsstatusinformationintheformofconditioncodes,whicharebitstypicallysetbytheprogrammerasaresultofprogramoperation.ANS:F(setbytheprocessorhardware)6.T/F–Theprocessingrequiredforasingleinstructiononatypical

4、computersystemiscalledtheExecuteCycle.ANS:F(calledtheInstructionCycle)7.T/F–AfetchedinstructionisnormallyloadedintotheInstructionRegister(IR).ANS:T8.T/F–Aninterruptisamechanismusedbysystemmodulestosignaltheprocessorthatnormalprocessingshouldbetemporarilysu

5、spended.ANS:T9.T/F–Toaccommodateinterrupts,anextrafetchcycleisaddedtotheinstructioncycle.ANS:F(interruptcycleisadded)10.T/F–Theminimuminformationthatmustbesavedbeforetheprocessortransferscontroltotheinterrupthandlerroutineistheprogramstatusword(PSW)andthel

6、ocationofthecurrentinstruction.ANS:F(locationofthenextinstruction)11.T/F–Oneapproachtodealingwithmultipleinterruptsistodisableallinterruptswhileaninterruptisbeingprocessed.ANS:TPage6of6OperatingSystemsChapter1–ComputerSystemsOverview1.T/F–Multiprogramminga

7、llowstheprocessortomakeuseofidletimecausedbylong-waitinterrupthandling.ANS:T2.T/F–Inatwo-levelmemoryhierarchy,theHitRatioisdefinedasthefractionofallmemoryaccessesfoundintheslowermemory.ANS:F(foundinthefastermemory)3.T/F–Cachememoryexploitstheprincipleofloc

8、alitybyprovidingasmall,fastmemorybetweentheprocessorandmainmemory.ANS:T4.T/F–Incachememorydesign,blocksizereferstotheunitofdataexchangedbetweencacheandmainmemoryANS:T5.T/F–TheprimaryproblemwithprogrammedI/Ois