操作系統(tǒng)選擇題庫答案及詳解

1、MultipleChoiceQuestions1Question1Thegeneralroleofanoperatingsystemisto:選擇一個答案a.Provideasetofservicestosystemusersb.Managefilesfapplicationprogramsc.Actasaninterfacebetweenvariouscomputersd.NoneoftheaboveFeedback:A.為系統(tǒng)用戶提

2、供一系列服務(wù)B.為應(yīng)用程序管理文件(這顯然不是)C.作為多臺計算機間的接口(應(yīng)該是CPU與硬件之間的接口)D.errQuestion2Infmationthatmustbesavedpritotheprocesstransferringcontroltotheinterrupthlerroutineincludes:選擇一個答案a.ProgramStatusWd(PSW)&Contentsofprocessregistersb.Prog

3、ramStatusWd(PSW)c.Noneoftheaboved.ProgramStatusWd(PSW)&LocationofnextinstructionFeedback:D.程序狀態(tài)字和下個指令的位置P14Question3Oneacceptedmethodofdealingwithmultipleinterruptsisto:選擇一個答案a.Servicetheminroundrobinfashionb.Disablealli

4、nterruptsexceptthoseofhighestpriityc.Noneoftheaboved.DefinepriitiesftheinterruptsFeedback:處理多個中斷的方法P18Thefirstistodisableinterruptswhileaninterruptisbeingprocessed.Asecondapproachistodefinepriitiesfinterruptstoallowanint

5、erruptofhigherpriitytocausealowerpriityinterrupthlertobeinterrupted.A.輪循服務(wù)(顯然錯誤)B.只服務(wù)優(yōu)先級高的，忽視優(yōu)先級低的C.errD.為這些中斷定義優(yōu)先級Question4高速緩沖存儲器設(shè)計：cachesize，blocksizemappingfunctionreplacementalgithmwritepolicy.Question8Thefourmainst

6、ructuralelementsofacomputersystemare:選擇一個答案a.Noneoftheaboveb.ProcessRegistersMainMemy&SystemBusc.ProcessMainMemyIOModules&SystemBusd.ProcessRegistersIOModules&MainMemyFeedback:計算機有四個主要的結(jié)構(gòu)化部件：處理器、主存儲器、輸入輸出模塊、系統(tǒng)總線P6Questio

7、n9Thetwobasictypesofprocessregistersare:選擇一個答案a.UservisibleControlStatusregistersb.ControlStatusregistersc.Uservisibleuserinvisibleregistersd.NoneoftheaboveFeedback:用戶可見寄存器：數(shù)據(jù)寄存器、地址寄存器、索引寄存器、段指針、棧指針控制和狀態(tài)寄存器：程序計數(shù)器PC、指令寄存器

8、IRQuestion10Addressregistersmaycontain選擇一個答案a.Partialmemyaddressesb.Memyaddressesofdatac.Memyaddressesofinstructionsd.AlloftheaboveFeedback:A.輔存地址B.數(shù)據(jù)的主存儲器地址C.指令的主存儲器地址Question11AControlStatusregisterthatcontainstheaddre

9、ssofthenextinstructiontobefetchediscalledthe:選擇一個答案a.ProgramCounter(PC)b.Alloftheabovec.InstructionRegister(IR)d.ProgramStatusWd(PSW)Feedback:A.Programcounter(PC)=AddressofinstructionC.Instructionregister(IR)=Instruction