精品文檔-下載后可編輯軟件設計師2022上半年上午試題

C.

D.

69.在異步通信中，每個字符包含1位起始位、7位數據位和2位終止位，若每秒鐘傳送500個字符，則有效數據速率為()[1分]

A.500b/s

B.700b/s

C.3500b/s

D.5000b/s

70.以下路由策略中，依據網絡信息經常更新路由的是()[1分]

A.靜態路由

B.洪泛式

C.隨機路由

D.自適應路由

71.Thebeautyofsoftwareisinitsfunction，initsinternalstructure，andinthewayinwhichitiscreatedbyateam.Toauser，aprogramwithjusttherightfeaturespresentedthroughanintuitiveand(71)interfaceisbeautiful.Toasoftwaredesigner，aninternalstructurethatispartitionedinasimpleandintuitivemanner，andthatminimizesinternalcouplingisbeautiful.Todevelopersandmanagers，amotivatedteamofdevelopersmakingsignificantprogresseveryweek，andproducingdefect-freecode，isbeautiful.Thereisbeautyonalltheselevels.ourworldneedssoftware--lotsofsoftware.Fiftyyearsagosoftwarewassomethingthatraninafewbigandexpensivemachines.Thirtyyearsagoitwassomethingthatraninmostcompaniesandindustrialsettings.Nowthereissoftwarerunninginourcellphones，watches，appliances，automobiles，toys，andtools.Andneedfornewandbettersoftwarenever(72).Asourcivilizationgrowsandexpands，asdevelopingnationsbuildtheirinfrastructures，asdevelopednationsstrivetoachieveevergreaterefficiencies，theneedformoreandmoreSoftware(73)toincrease.Itwouldbeagreatshameif，inallthatsoftware，therewasnobeauty.Weknowthatsoftwarecanbeugly.Weknowthatitcanbehardtouse，unreliable，andcarelesslystructured.Weknowthattherearesoftwaresystemswhosetangledandcarelessinternalstructuresmakethemexpensiveanddifficulttochange.Weknowthattherearesoftwaresystemsthatpresenttheirfeaturesthroughanawkwardandcumbersomeinterface.Weknowthattherearesoftwaresystemsthatcrashandmisbehave.Theseare(74)systems.Unfortunately，asaprofession，softwaredeveloperstendtocreatemoreuglysystemsthanbeautifulones.Thereisasecretthatthebestsoftwaredevelopersknow.Beautyischeaperthanugliness.Beautyisfasterthanugliness.Abeautifulsoftwaresystemcanbebuiltandmaintainedinlesstime，andforlessmoney,thananuglyone.Novicesoftwaredevelopersdon't.understandthis.Theythinkthattheyhavetodoeverythingfastandquick.Theythinkthatbeautyis(75).No!Bydoingthingsfastandquick，theymakemessesthatmakethesoftwarestiff，andhardtounderstand，Beautifulsystemseflexibleandeasytounderstand.Buildingthemandmaintainingthemisajoy.Itisuglinessthatisimpractical.Uglinesswillslowyoudownandmakeyoursoftwareexpensiveandbrittle.Beautifulsystemscosttheleastbuildandmaintain，andaredeliveredsoonest.[1分]

A.Simple

B.Hard

C.Complex

D.duplicated

72.72[1分]

A.happens

B.exists

C.stops

D.starts

73.73[1分]

A.starts

B.