计算机专业英语习题+答案.doc

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1、习题+答案2.1WriteTorFtoeachstatementT6.Anasynchronousdeviceisaclockeddevice.T7.Alatchisanasynchronousdevice,becauseitfunctionsatarbitrarytimes.T8.Therepetitionofclockpulsecanvaryfromverylowratetoveryhighrate.T9.Asynchronousdevicechangesitsstateonlyonthearrivalofaclockpulse.F10.Aclockinputmayoccuratany

2、time.T11.Theclockpulsesareusedtosynchronizealloperationsoftheshiftregister.T13.Aunidirectionalshiftregisteriscapableofshiftinginonedirectiononly.F14.Inashift-leftregistertheserialinputdetermineswhatgoesintotheleftmostpositionduringtheshiftregister.F15.Toprovideparalleltransfercapabilitysomeadditio

3、nalinputandoutputlinesshouldbeprovidedtotheshiftregister.Choosethebestanswerforeachofthefollowing1.Howcantheoutputofalogicgatebeenergized?CABychangingitsinputs.BByremainingitsinputsunchanged.CBymeetingthespecificinputcondition.DBygivingapulse.3.ANANDgateconsistsofD.AanORgatefollowedbyaninverterBan

4、ANDgatefollowedbyaninverterCanANDgatefollowedbyanORgateDaninverterfollowedbyanANDgate4.Underwhatconditionistheoutputofatwo-inputXORgatelogic-high?BAItsinputsaresimultaneouslyatthesamelogiclevel.BItsinputsaresimultaneouslyatoppositelogiclevels.CItsinputsarelogic-low.Ditsinputsaresimultaneouslylogic

5、-high.2.2WriteTorFforeachstatementT1.TheCPUusestheinputandoutputunitstocommunicatewiththeoutsideworld.F2.Mainmemoryissometimescalledexternalmemory.F3.Afterexecutiontheprogramandtherelatedfilesofdataandfilesofinformationwillberetainedinthemainmemoryforlateruse.F4.Personalcomputershavenotthefeatures

6、ofthelargersystem..T5.LargesystemsofferhigherprocessingspeedsforuserandreturnmoredatathanPCs.6F6.CPUsallsizehaveprimarystorage,arithmeticlogic,andthecontrolsection.F7.Theoutputdeviceistheheartofanycomputersystem.T8.Theinput/outputdevicesandauxiliarystorageunitsofacomputersystemarecalledperipherals

7、.F9.TheinstrumentofinterpretationandcommunicationbetweenhumansandcomputerssystemofallsizesisCPU.F10Specialpurposecomputerscanadaptedtomanysituationbygivingthemanappropriateprogram.F11.Aminicomputeristhesmallestan