OS Multiple Choice Questions.docx
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OSMultipleChoiceQuestions
MultipleChoiceQuestions1
Question1
Thegeneralroleofanoperatingsystemisto:
选择一个答案
a.Provideasetofservicestosystemusers
b.Managefilesforapplicationprograms
c.Actasaninterfacebetweenvariouscomputers
d.Noneoftheabove
Feedback:
A.为系统用户提供一系列服务
B.为应用程序管理文件（这显然不是）
C.作为多台计算机间的接口（应该是CPU与硬件之间的接口）
D.error
Question2
Informationthatmustbesavedpriortotheprocessortransferringcontroltotheinterrupthandlerroutineincludes:
选择一个答案
a.ProgramStatusWord（PSW）&Contentsofprocessorregisters
b.ProgramStatusWord（PSW）
c.Noneoftheabove
d.ProgramStatusWord（PSW）&Locationofnextinstruction
Feedback:
D.程序状态字和下个指令的位置P14
Question3
Oneacceptedmethodofdealingwithmultipleinterruptsisto:
选择一个答案
a.Servicetheminround-robinfashion
b.Disableallinterruptsexceptthoseofhighestpriority
c.Noneoftheabove
d.Defineprioritiesfortheinterrupts
Feedback:
处理多个中断的方法P18
Thefirstistodisableinterruptswhileaninterruptisbeingprocessed.
Asecondapproachistodefineprioritiesforinterruptsandtoallowaninterruptofhigherprioritytocausealower-priorityinterrupthandlertobeinterrupted.
A.轮循服务（显然错误）
B.只服务优先级高的，忽视优先级低的
C.error
D.为这些中断定义优先级
Question4
Inauniprocessorsystem（单处理器系统）,multiprogramming（多道程序设计）increasesprocessorefficiencyby:
选择一个答案
a.Takingadvantageoftimewastedbylongwaitinterrupthandling
b.Eliminatingallidleprocessorcycles
c.Alloftheabove
d.Increasingprocessorspeed
Feedback:
A.利用等待中断的时间P18
Question5
Asoneproceedsdownthememoryhierarchy（i.e.,frominboardmemorytoofflinestorage）,thefollowingcondition（s）apply:
选择一个答案
a.Decreasingcapacity
b.Increasingaccesstime
c.Alloftheabove
d.Increasingcostperbit
Feedback:
A.容量↑
B.访问时间↑
C.error
D.价格↓
Question6
Small,fastmemorylocatedbetweentheprocessorandmainmemoryiscalled
选择一个答案
a.WORMmemory
b.CD-RWmemory
c.Noneoftheabove
d.Cachememory
Feedback:
D.存储器的层次结构由上至下依次为：
寄存器（processer），高速缓存，主存储器（memory），磁盘，磁带
Question7
Whenanewblockofdataiswrittenintocachememory,thefollowingdetermineswhichcachelocationtheblockwilloccupy:
选择一个答案
a.Noneoftheabove
b.Cachesize
c.Blocksize
d.Writepolicy
Feedback:
Nothingwillchange.
高速缓冲存储器设计：
cachesize，blocksize,mappingfunction,replacementalgorithm,writepolicy.
Question8
Thefourmainstructuralelementsofacomputersystemare:
选择一个答案
a.Noneoftheabove
b.Processor,Registers,MainMemory&SystemBus
c.Processor,MainMemory,I/OModules&SystemBus
d.Processor,Registers,I/OModules&MainMemory
Feedback:
计算机有四个主要的结构化部件：
处理器、主存储器、输入/输出模块、系统总线P6
Question9
Thetwobasictypesofprocessorregistersare:
选择一个答案
a.User-visibleandControl/Statusregisters
b.ControlandStatusregisters
c.User-visibleanduser-invisibleregisters
d.Noneoftheabove
Feedback:
用户可见寄存器：
数据寄存器、地址寄存器、索引寄存器、段指针、栈指针
控制和状态寄存器：
程序计数器PC、指令寄存器IR
Question10
Addressregistersmaycontain
选择一个答案
a.Partialmemoryaddresses
b.Memoryaddressesofdata
c.Memoryaddressesofinstructions
d.Alloftheabove
Feedback:
A.辅存地址
B.数据的主存储器地址
C.指令的主存储器地址
Question11
AControl/Statusregisterthatcontainstheaddressofthenextinstructiontobefetchediscalledthe:
选择一个答案
a.ProgramCounter（PC）
b.Alloftheabove
c.InstructionRegister（IR）
d.ProgramStatusWord（PSW）
Feedback:
A.Programcounter（PC）=Addressofinstruction
C.Instructionregister（IR）=Instructionbeingexecuted
D.ProgramStatusWord（PSW）=containsstatusinformation
Question12
Thetwobasicstepsusedbytheprocessorininstructionprocessingare:
选择一个答案
a.Noneoftheabove
b.FetchandInstructioncycles
c.FetchandExecutecycles
d.InstructionandExecutecycles
Feedback:
Initssimplestform,instructionprocessingconsistsoftwosteps:
Theprocessorreads（fetches）instructionsfrommemoryoneatatimeandexecuteseachinstruction.P9
Question13
Afetchedinstructionisnormallyloadedintothe:
选择一个答案
a.Accumulator（AC）
b.Noneoftheabove
c.InstructionRegister（IR）
d.ProgramCounter（PC）
Feedback:
Instructionregister（IR）=Instructionbeingexecuted
A.Accumulator（AC）=Temporarystorage临时存储体
Question14
Acommonclassofinterruptsis
选择一个答案
a.Program
b.I/O
c.Timer
d.Alloftheabove
Feedback:
Classesofinterrupts:
Program,Timer,I/O,Hardwarefailure
Question15
Whenanexternaldevicebecomesreadytobeservicedbytheprocessor,thedevicesendsthistypeofsignaltotheprocessor:
选择一个答案
a.Handlersignal
b.Noneoftheabove
c.Interruptsignal
d.Haltsignal
Feedback:
请求中断信号
MultipleChoiceQuestions2
Question1
Aprimaryobjectiveofanoperatingsystemis:
选择一个答案
a.Abilitytoevolve
b.Convenience
c.Efficiency
d.Alloftheabove
Feedback:
操作系统的三个主要目标：
方便，有效，扩展的能力
Question2
Thepagingsysteminamemorymanagementsystemprovidesfordynamicmappingbetweenavirtualaddressusedinaprogramand:
选择一个答案
a.Arealaddressinaprogram
b.Noneoftheabove
c.Avirtualaddressinmainmemory
d.Arealaddressinmainmemory
Feedback：
Thepagingsystemprovidesforadynamicmappingbetweenthevirtualaddressusedintheprogramandarealaddress,orphysicaladdress,inmain
memory.P51
Question3
Relativetoinformationprotectionandsecurityincomputersystems,accesscontroltypicallyrefersto:
选择一个答案
a.Theflowofdatawithinthesystem
b.Provingthatsecuritymechanismsperformaccordingtospecification
c.Regulatinguserandprocessaccesstovariousaspectsofthesystem
d.Noneoftheabove
Feedback：
调节用户和进程对系统方方面面的访问权限
Question4
Acommonproblemwithfull-featuredoperatingsystems,duetotheirsizeanddifficultyofthetaskstheyaddress,is:
选择一个答案
a.Sub-parperformance
b.Chronicallylateindelivery
c.Alloftheabove
d.Latentbugsthatshowupinthefield
Feedback：
一个功能完善的操作系统的大小和它所处理任务的困难性，导致了四个让人遗憾但又普遍存在的问题：
① 操作系统在交付使用时习惯性表现出落后
② 系统有潜在的错误
③ 总是难以达到期望的性能
④ 不可能开发出既复杂又不易受各种安全性攻击的操作系统
P54
Question5
Atechniqueinwhichaprocess,executinganapplication,isdividedintothreadsthatcanrunconcurrentlyiscalled:
选择一个答案
a.Noneoftheabove
b.Multithreading
c.Symmetricmultiprocessing（SMP）
d.Multiprocessing
Feedback：
Multithreadingisatechniqueinwhichaprocess,executinganapplication,isdividedintothreadsthatcanrunconcurrently.P56
Question6
WIN2Ksupportsseveraltypesofuserapplications,including:
选择一个答案
a.Linux
b.System10
c.WIN32
d.Noneoftheabove
Feedback：
Nothing~
Question7
KeytothesuccessofLinuxhasbeenit’scharacterasafreesoftwarepackageavailableundertheauspicesofthe:
选择一个答案
a.BerkeleySoftwareDistribution
b.FreeSoftwareFoundation
c.WorldWideWebConsortium
d.Noneoftheabove
Feedback：
KeytothesuccessofLinuxhasbeentheavailabilityoffreesoftwarepackages
undertheauspicesoftheFreeSoftwareFoundation（FSF）.P70
Question8
Theoperatingsystemprovidesmanytypesofservicestoend-users,programmersandsystemdesigners,including:
选择一个答案
a.Built-inuserapplications
b.Alloftheabove
c.Relationaldatabasecapabilitieswiththeinternalfilesystem
d.Errordetectionandresponse
Feedback：
theOStypicallyprovidesservicesinthefollowingareas：
•Programdevelopment•Programexecution•AccesstoI/Odevices
•Controlledaccesstofiles•Systemaccess•Errordetectionandresponse•Accounting
Question9
Theoperatingsystemisunusualinit’sroleasacontrolmechanism,inthat:
选择一个答案
a.Itrunsonaspecialprocessor,completelyseparatedfromtherestofthesystem
b.Itneverrelinquishescontrolofthesystemprocessor
c.Noneoftheabove
d.Itfrequentlyrelinquishescontrolofthesystemprocessorandmustdependontheprocessortoregaincontrolofthesystem
Feedback：
•TheOSfunctionsinthesamewayasordinarycomputersoftware;thatis,itisaprogramorsuiteofprogramsexecutedbytheprocessor.
•TheOSfrequentlyrelinquishescontrolandmustdependontheprocessortoallowittoregaincontrol.P40
Question10
Operatingsystemsmustevolveovertimebecause
选择一个答案
a.Userswillonlypurchasesoftwarethathasacurrentcopyrightdate
b.Newhardwareisdesignedandimplementedinthecomputersystem
c.Alloftheabove
d.Hardwaremustbereplacedwhenitfails
Feedback：
计算机需要不断发展的原因：
硬件升级和新型硬件的出现、新的服务、纠正错误
P40/41
Question11
Amajorproblemwithearlyserialprocessingsystemswas:
选择一个答案
a.Inabilitytogethardcopyoutput
b.Setuptime
c.Lackofinputdevices
d.Alloftheabove
Feedback：
调度和准备时间
Question12
Anexampleofahardwarefeaturethatisdesirableinabatch-processingsystemis
选择一个答案
a.Noneoftheabove
b.Acompletelyaccessiblememoryarea
c.Largeclockcycles
d.Privilegedinstructions
Feedback：
内存保护、定时器、特权指令、中断
Question13
Acomputerhardwarefeaturethatisvitaltotheeffectiveoperationofamultiprogrammingoperatingsystemis:
选择一个答案
a.Verylargememory
b.Multipleprocessors
c.I/OinterruptsandDMA
d.Alloftheabove
Feedback：
支持I/O中断和直接存储器访问
Question14
Theprincipleobjectiveofatimesharing,multiprogrammingsystemisto
选择一个答案
a.Maximizeprocessoruse
b.Noneoftheabove
c.Provideexclusiveaccesstohardware
d.Maximizeresponsetime
Feedback：
批处理多道程序设计是为了充分使用处理器，分时多道程序设计是为了减小响应时间
Question15
Whichofthefollowingmajorlineofcomputersystemdevelopmentcreatedproblemsintimingandsynchronizationthatcontributedtothedevelopmentoftheconceptoftheprocess?
选择一个答案
a.Multiprogrammingbatchoperationsystems
b.Realtimetransactionsystems
c.Alloftheabove
d.Timesharingsystems
Feedback：
Threemajor
升级会员 