四川大学期末SSD2考试试题B卷Word文档格式.docx

四川大学期末SSD2考试试题B卷Word文档格式.docx

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五

六

七

八

九

十

得分

阅卷教师

阅卷时间

总成绩

期末卷面

%

期中卷面

实验成绩

考勤成绩

一、单项选择题（在每小题的四个备选答案中，选出一个正确的答案。

每小题1分，共40分）

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1.Howmanybitsarerequiredtostoreanygivennumberintherange0to255?

（a）16（b）32（c）8（d）4

2.Whatisthebinaryequivalentofthedecimalnumber123?

（a）1111111（b）1111011（c）1101110（d）1111101

3.AnArithmetic/LogicUnittypicallyperformswhichofthefollowingoperations?

I.RetrievalofinstructionsfromRAM

II.Performanceofgreater-thanandless-thancomparisons

（a）IIonly（b）Ionly（c）None（d）IandII

4.WhichofthefollowingkindsofprojectstypicallyrequiresaspecialtypeofCPUthatwouldnotbefoundinadesktopormainframecomputer?

a.Monitoringtheoperationofanautomobileengine

b.Performingbusinesscalculationsforafinancialreport

c.Lookingupandstoringinformationoncustomeraccounts

d.Processingrequeststosendandreceiveemail

5.Computeroutputdevicesincludewhichofthefollowing?

I.ProjectorII.MicrophoneIII.Printer

（a）I,II,andIII（b）IIandIIIonly（c）IandIIonly（d）IandIIIonly

6.Ofthefollowingtypesofstorage,whichprovidesthefastestaccesstodata?

（a）RAM（b）CD-ROM（c）harddisk（d）cache

7.Floppydiskstypicallyholdabout_____ofdata,whileharddiskdrivestypicallyholdseveral_____ofdata

（a）100KB,GBs（b）10MB,TBs（c）1MB,GBs（d）1MB,TBs

8.WhyisitimportanttohavelargeamountsofRAMinacomputersystem?

（a）ProgramscannotaccessfilesunlesstheentirefileisfirstloadedintoRAM.

（b）RAMcontinuestobelessexpensivethanharddiskmemory.

（c）YoucannotloadandexecuteaprogramunlessthereissufficientRAMtoholdallofaprogram'

sCPUinstructions.

（d）MultitaskingandlargeprogramsrunslowlyifthereisinsufficientRAM.

9.Inacomputer,mostprocessingtakesplaceinthe

（a）RAM（b）CPU（c）ROM（d）LAN

10.Whichofthefollowingstatementsis（are）true?

I．CD-ROMdrivesuselasertechnology.

II．CD-ROMdrivestypicallycannotbeusedtowritedataontodisks.

（a）IIonly（b）None（c）Ionly（d）IandII

11.Inatypicalcomputer,whensavingdatatotheharddisk,thechipsetsendsthedatatothediskcontrollerviathe

（a）AGPbus（b）parallelports（c）serialports（d）PCIbus

12.Inatypicalcomputer,datafromstoragedevicesispassedtothechipsetthroughthe

（a）diskcontroller（b）PCIexpansionslots（c）AGPexpansionslots（d）PS-2ports

13.Computersthatoperateinessentiallythesamewayaresaidtobe

（a）Integrated（b）user-friendly（c）compound（d）compatible

14.Whichofthefollowingsoftwarelayersequencescorrectlyrepresentsthetaskofsavingafilewithatexteditor?

（a）application,operatingsystem,devicedriver,hardware

（b）operatingsystem,application,hardware,devicedriver

（c）application,operatingsystem,hardware,devicedriver

（d）operatingsystem,devicedriver,application,hardware

15.Akeyboardinterruptoccurs:

（a）eachtimeakeyispressed

（b）onlywhentheESCkeyispressed

（c）onlywhentheENTERkeyispressed

（d）whenthepowersupplyisdisconnected

16.Whichofthefollowingis（are）trueregardingtheclustersizeofadiskdrive?

I．Aclusteristhesmallestamountofspacethatafilecanoccupyinadisk.

II．Theclustersizewilldecreaseasthesizeofthediskincreases.

（a）IandII（b）IIonly（c）None（d）Ionly

17.Applicationsthataredesignedtoworktogethertocreatecomplexdocumentscontainingdifferenttypesofdataarereferredtoas

（a）groupware（b）consolidated（c）utilities（d）anofficesuite

18.ThetypeofdatacontainedwithinafileinWindowsisindicatedbythe_____ofthefile.

（a）parentfolder（b）extension（c）attributes（d）content

19.Whichofthefollowingaretrueregardingtheuseofvirtualmemoryinacomputersystem?

I.VirtualmemoryprovidestheillusionofmoreRAMthanactuallyexists.

II.Excessiveuseofvirtualmemorybyacomputersystemcanslowoverallperformance.

III.TheCPUexecutesinstructionsdirectlyfromvirtualmemory.

（a）IandIIIonly（b）I,II,andIII（c）IandIIonly（d）IIandIIIonly

20.Whichofthefollowingis（are）trueofadatabase?

I．Adatabasecancontainavarietyofdifferentrecordformats.

II．Eachdatabasecanhaveonlyonerecordformat.

III．Adatabaseconsolidatesflatfilesintoasinglecollectionofdiverseinformation.

（a）IIandIIIonly（b）IandIIIonly（c）Ionly（d）IIonly

21.Whoofthefollowingfocusesonthesoftwarecomponentofaninformationsystem,includingsoftwaredesign,programming,andtesting?

（a）Systemsanalyst（b）Softwareengineer（c）Databaseadministrator（d）Systemsadministrator

22．Software_____referstotheprocessofdevelopingsoftwareusingsystematicmathematical,engineering,andmanagementtechniques.

（a）programming（b）design（c）algorithmcreation（d）engineering

23.VirtualmemoryinvolvestemporarilymovingunneededinstructionsordatafromRAMto

（a）cachememory（b）acomputeronthenetwork（c）aharddisk（d）theCPU

24.Virtualmemoryaccomplisheswhichofthefollowing?

（a）RequiresprogramstoknowwhatareasofRAMareavailabletobeused

（b）Allowsprogramstoexecutefaster

（c）Operatesintheprocessor'

srealaddressmode

（d）Allowslargeprogramstoexecute

25.Inthesoftwaredevelopmentprocess,whichofthefollowingmethodsareusedtoassistprogrammersinfinding"

bugs"

intheirsoftware?

i.I.Debugging

ii.II.Testing

iii.III.CodeReviews

（a）IandIIIonly（b）IandIIonly（c）I,II,andIII（d）IIandIIIonly

26.Devicedriversfacilitatecommunicationbetweenwhichlayersofthesystem?

（a）Theoperatingsystemandapplicationsusinghardwaredevices

（b）Theoperatingsystemandhardwaredevices

（c）Applicationsandhardwaredevices

（d）Differenthardwaredevices

27.WhichofthefollowingareprogramscontainingsoftwareinstructionstobeexecutedbytheCPU?

I．BIOS

II．Devicedriver

III．Operatingsystem

（a）IandIIIonly（b）IandIIonly（c）IIandIIIonly（d）I,II,andIII

28.Networkstypicallyuse_____cable.

（a）NIC（b）coaxial（c）twistedpair（d）wireless

29．Whichofthefollowingcomponentsarerequiredforanemailsystem?

I．Emailserversoftware

II．Postofficesoftware

III．Emailclientsoftware

（a）IIandIIIonly（b）I,II,andIII（c）IandIIIonly（d）IandIIonly

30.WebpageURLsbeginwith

（a）http:

//（b）url:

//（c）www:

//（d）page:

//

31．WhichofthefollowingaretasksperformedbyaWebbrowser?

I．Sendingarequestforaspecificfiletoaserver

II．Formattinganddisplayingafilereceivedfromaserver

III．Sendingadditionalrequeststotheservertoretrieveanygraphicselementssuchasiconsorimagesforarequestedfile（a）I,II,andIII（b）IIandIIIonly（c）IandIIonly（d）IandIIIonly

32.WhichofthefollowingsymbolsisusedtoseparatedirectorypathsinaURL?

（a）.（b）//（c）/（d）:

33．Whichofthefollowingcanhelptopreventport-scanningattacks?

I.Destroyorlockupsensitiveinformation

II.Closeunusedports

III.Monitornetworkusageandinvestigatesuspiciousactivities

34．Whichofthefollowingmustbeincludedonadigitalcertificate?

I．Thenameoftheentityandtheexpirationdate

II．Thenumberoftimesthecertificatehasbeenviewed

III．Thedigitalsignatureofthecertificateauthority

（a）I,andIII（b）IIandIIIonly（c）IandIIonly（d）I,II,andIII

35.Whichofthefollowingcanhelppreventdenialofserviceattacks?

I.Defragmentharddrivesfrequently.

II.Disableorblockanyunusednetworkservices.

（a）Ionly（b）None（c）IandII（d）IIonly

36.OneofthemostcommonapplicationsofencryptionistransmittingdatasecurelyovertheWebvia

（a）asimplesubstitutioncode（b）aTrojanhorse（c）e-mail（d）theSecureSocketLayer（SSL）

37.Whichofthefollowingcorrectlycharacterizesthepartoftheemailaddressafterthe@（the"

at"

sign）?

（a）TheIPaddressoftherecipient'

scomputer

（b）TheWebserveroftherecipient

（c）Thecomputernameoftherecipient'

（d）Theemailservernameonwhichtherecipienthasanaccount

38.Whichofthefollowingarecommonlyusednetworktopologies?

I.Star

II.Ring

III.Modems

（a）IIandIIIonly

（b）IandIIonly

（c）IIIonly

（d）IandIIIonly

39．WhenconnectingtoanISPusingastandardphoneline,whichofthefollowingis（are）required?

I.AphonenumbertoaccesstheISP'

sInternetservercomputer

II.Accountnameandpassword

III.Aninternalorexternalmodem

（a）IandIIIonly（b）IandIIonly（c）IIandIIIonly（d）I,II,andIII

40.Thebandwidthofa（n）_____signalisusuallymeasuredinbitspersecond.

（a）satellite

（b）video

（c）digital

（d）analog

二、问答题（6道题，共60分）

1．Dictionary-basedCompression（10分）

Considerthemessagebelow:

exam1,exam2,andexam3arerequiredexams.

a.Howmanybytesdoesthemessagecontain（eachcharacteri