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当采用标准UML构建系统类模型(Class Model)时，若类B除了具有类A的全部特性外，类B还可定义新的特性以及置换类A的部分特性，那么类B与类A具有 (39) 关系；若类A的对象维持类B对象的引...
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UML是面向对象开发方法的标准化建模语言采用UML对系统建模时用模型描述系统的功能等价于传统的系统功
分析
设计
用例
实现
当采用标准UML构建系统类模型ClassModel时若类B除具有类A的全部特性外类B还可定义新的特性
聚合
泛化
传递
迭代
当采用标准UML构建系统类模型ClassModel时若类B除了具有类A的全部特性外类B还可定义
聚合
泛化
传递
迭代
当采用标准UML构建系统类模型ClassModel时若类B除了具有类A的全部特性外类B还可定义
聚合
泛化
传递
迭代
当采用标准UML构建系统类模型ClassModel时若类B除具有类A的全部特性外还可定义新的特性以
聚合
泛化
传递
迭代
当采用标准UML构建系统类模型ClassModel时若类B除具有类A的全部特性外还可定义新的特性以及
聚合
泛化
传递
迭代
在开发某保险商务系统时项目组人员绘制了如下所示的模型图关于该保险商务系统和模型图下列说法正确的是
此模型图是UML类图，它描述了保险商务系统的总统动态行为
此模型图是UML部署图，它描述了保险商务系统中的构件及其依赖关系
此模型图是UML协作图，它描述了保险商务系统用户之间的协作和交互
此模型图是UML用例图，她描述了外部参与者及其与保险商务系统的交互
统一建模语言UML是面向对象开发方法的标准化建模语言采用UML对系统建模时用13模型描述系统的功能等
分析
设计
用例
实现
在采用标准UML构建的用例模型UseCaseModel中参与者Actor与用例UseCase是模型中
包含（includ
递归（Recursiv
关联（Association）
组合（Composit
在采用标准UML构建的用例模型UseCaseModel中参与者Actor与用例UseCase是模型中
包含(include)
递归(Recursive)
关联(Association)
组合(Composite)
采用UML对系统建模时用描述系统的全部功能
分析模型
设计模型
用例模型
实现模型
当采用标准UML构建系统类模型ClassModel时若类B除具有类A的全部特性外类B还可定义新
聚合
泛化
传递
迭代
统一建模语言UML是面向对象开发方法的标准化建模语言采用UML对系统建模时用描述系统的全部功能等价于
分析模型
设计模型
用例模型
实现模型
统一建模语言UML是面向对象开发方法的标准化建模语言采用UML对系统建模时用模型描述系统的功能等价于
分析
设计
用例
实现
在采用标准UML构建的用例模型UseCaseModel中参与者Actor与用例UseCase是模型中
包含(include)
递归(Recursive)
关联(Association)
组合(Composite)
在采用标准UML构建的用例模型Use-CaseModel中参与者Actor与用例Use-Case是模
包含(Include)
递归(Recursive)
关联(Association)
组合(Composite)
当采用标准UML构建系统类模型ClassModel时若类B除具有类A的全部特性外类B还可定义新的特性
聚合
泛化
传递
迭代
当采用标准UML构建系统类模型ClassModel时若类B除具有类A的全部特性外类B还可定义新
聚合
泛化
传递
迭代
统一建模语言UML是面向对象开发方法的标准化建模语言采用UML对系统建模时用13模型描述系统的功能等
分析
设计
用例
实现
当采用标准UML构建系统类模型ClassModel时若类B除具有类A的全部特性外类B还可定义新的特性
聚合
泛化
传递
迭代
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Thepurposeoftherequirementsdefinitionphaseistoproduceaclearcompleteconsistentandtestable36ofthetechnicalrequirementsforthesoftwareproduct. Duringtherequirementsdefinitionphasetherequirementsdefinitionteamusesaninterativeprocesstoexpandabroadstatementofthesystemrequirementsintoacompleteanddetailedspecificationofeachfunctionthatthesoftwaremustperformandeach37thatitmustmeet.Thestartingpointisusuallyasetofhighlevelrequirementsfromthe38thatdescribetheprojectorproblem. Ineithercasetherequirementsdefinitionteamformulatesanoverallconceptfor’thesystemandthendefines39showinghowthesystemwillbeoperatedpublishesthesystemandoperationsconceptdocumentandconductsasystemconceptreviewSCR. FollowingtheSCRtheteamderives40requirementsforthesystemfromthehighlevelrequirementsandthesystemandoperationsconceptusingstructuredorobject-orientedanalysis.Theteamspecifiesthesoftwarefunctionsandalgorithmsneededtosatisfyeachdetailedrequirement. 36是
41isaprotocolthatahostusestoinformarouterwhenitjoinsorleavesanInternetmulticastgroup. 42isanerrordetectioncodethatmostdatacommunicationnetworksuse. 43isaninteriorgatewayprotocolthatusesadistancevectoralgorithmtopropagateroutinginformation. 44isatransfermodeinwhichalltypesofinformationareorganizedintofixedformcellsonanasynchronousornon-periodicbasisoverarangeofmedia. 45isanidentifierofawebpage. 45是
41isaprotocolthatahostusestoinformarouterwhenitjoinsorleavesanInternetmulticastgroup. 42isanerrordetectioncodethatmostdatacommunicationnetworksuse. 43isaninteriorgatewayprotocolthatusesadistancevectoralgorithmtopropagateroutinginformation. 44isatransfermodeinwhichalltypesofinformationareorganizedintofixedformcellsonanasynchronousornon-periodicbasisoverarangeofmedia. 45isanidentifierofawebpage. 43是
41isaprotocolthatahostusestoinformarouterwhenitjoinsorleavesanInternetmulticastgroup. 42isanerrordetectioncodethatmostdatacommunicationnetworksuse. 43isaninteriorgatewayprotocolthatusesadistancevectoralgorithmtopropagateroutinginformation. 44isatransfermodeinwhichalltypesofinformationareorganizedintofixedformcellsonanasynchronousornon-periodicbasisoverarangeofmedia. 45isanidentifierofawebpage. 41是
在软件开发过程中常用图作为描述工具DFD就是面向46分析方法的描述工具在一套分层DFD中如果某一张图中有N个加工Process则这张图允许有47张子图在一张DFD图中任意两个加工之间48在画分层DFD时应注意保持49之间的平衡DFD中从系统的输入流到系统的输出流的一连串连续变换形成一种信息流这种信息流可分为50两大类
51isasixbytesOSIlayer2addresswhichisburnedintoeverynetworkingdevicethatprovidesitsuniqueidentityforpointtopointcommunication. 52isaprofessionalorganizationofindividualsinmultipleprofessionswhichfocusesoneffortonlower-layerprotocols. 53functionswithtwolayersofprotocols.Itcanconnectnetworksofdifferentspeedsandcanbeadaptedtoanenvironmentasitexpands. 54isthepopularLANdevelopedunderthedirectionoftheIEEE802.5. 55isthepopularbackbonetechnologyfortransmittinginformationathighspeedwithahighleveloffaulttolerancewhichisdevelopedunderthedirectionofANSI. 53是
Networkscanbeinterconnectedbydifferentdevices.Inthephysicallayernetworkscanbeconnectedby31orhubswhichjustmovethebitsfromonenetworktoanidenticalnetwork.Onelayerupwefindbridgesandswitcheswhichoperateatdatalinklayer.Theycanaccept32examinetheMACaddressandforwardtheframestoadifferentnetworkwhiledoingminorprotocoltranslationintheprocess.Innetworklayerwehaveroutersthatcanconnecttwonetworks.Iftwonetworkshave33networklayerthemutermaybeabletotranslatebetweenthepackerformats.Inthetransportlayerwefindtransportgatewaywhichcaninterfacebetweentwotransportconnections.Finallyintheapplicationlayerapplicationgatewaystranslatemessage34.AsanexamplegatewaysbetweenInternete-mailandX.400e-mailmust35thee-mailmessageandchangevariousheaderfields. 32是
Thepurposeoftherequirementsdefinitionphaseistoproduceaclearcompleteconsistentandtestable36ofthetechnicalrequirementsforthesoftwareproduct. Duringtherequirementsdefinitionphasetherequirementsdefinitionteamusesaninterativeprocesstoexpandabroadstatementofthesystemrequirementsintoacompleteanddetailedspecificationofeachfunctionthatthesoftwaremustperformandeach37thatitmustmeet.Thestartingpointisusuallyasetofhighlevelrequirementsfromthe38thatdescribetheprojectorproblem. Ineithercasetherequirementsdefinitionteamformulatesanoverallconceptfor’thesystemandthendefines39showinghowthesystemwillbeoperatedpublishesthesystemandoperationsconceptdocumentandconductsasystemconceptreviewSCR. FollowingtheSCRtheteamderives40requirementsforthesystemfromthehighlevelrequirementsandthesystemandoperationsconceptusingstructuredorobject-orientedanalysis.Theteamspecifiesthesoftwarefunctionsandalgorithmsneededtosatisfyeachdetailedrequirement. 40是
的邻接矩阵是一个对称矩阵
斐波那契Fibonacci数列可以递归地定义为 用递归算法求解F5时需要执行76次“+”运算该方法采用的算法策略是77 76处填
51isasixbytesOSIlayer2addresswhichisburnedintoeverynetworkingdevicethatprovidesitsuniqueidentityforpointtopointcommunication. 52isaprofessionalorganizationofindividualsinmultipleprofessionswhichfocusesoneffortonlower-layerprotocols. 53functionswithtwolayersofprotocols.Itcanconnectnetworksofdifferentspeedsandcanbeadaptedtoanenvironmentasitexpands. 54isthepopularLANdevelopedunderthedirectionoftheIEEE802.5. 55isthepopularbackbonetechnologyfortransmittinginformationathighspeedwithahighleveloffaulttolerancewhichisdevelopedunderthedirectionofANSI. 55是
Networkscanbeinterconnectedbydifferentdevices.Inthephysicallayernetworkscanbeconnectedby31orhubswhichjustmovethebitsfromonenetworktoanidenticalnetwork.Onelayerupwefindbridgesandswitcheswhichoperateatdatalinklayer.Theycanaccept32examinetheMACaddressandforwardtheframestoadifferentnetworkwhiledoingminorprotocoltranslationintheprocess.Innetworklayerwehaveroutersthatcanconnecttwonetworks.Iftwonetworkshave33networklayerthemutermaybeabletotranslatebetweenthepackerformats.Inthetransportlayerwefindtransportgatewaywhichcaninterfacebetweentwotransportconnections.Finallyintheapplicationlayerapplicationgatewaystranslatemessage34.AsanexamplegatewaysbetweenInternete-mailandX.400e-mailmust35thee-mailmessageandchangevariousheaderfields. 34是
MIDIenablespeopletouse11computersandelectronicmusicalinstruments.ThereareactuallythreecomponentstoMIDIthecommunications"12."theHardwareInterfaceandadistribution13called"StandardMIDIFiles".InthecontextoftheWWWthemostinterestingcomponentisthe14Format.InprincipleMIDIfilescontainsequencesofMIDIProtocolmessages.HoweverwhenMIDIProtocol15arestoredinMIDIfilestheeventsarealsotime-stampedforplaybackinthepropersequence.MusicdeliveredbyMIDIfilesisthemostcommonuseofMIDItoday. 13是
Thepurposeoftherequirementsdefinitionphaseistoproduceaclearcompleteconsistentandtestable36ofthetechnicalrequirementsforthesoftwareproduct. Duringtherequirementsdefinitionphasetherequirementsdefinitionteamusesaninterativeprocesstoexpandabroadstatementofthesystemrequirementsintoacompleteanddetailedspecificationofeachfunctionthatthesoftwaremustperformandeach37thatitmustmeet.Thestartingpointisusuallyasetofhighlevelrequirementsfromthe38thatdescribetheprojectorproblem. Ineithercasetherequirementsdefinitionteamformulatesanoverallconceptfor’thesystemandthendefines39showinghowthesystemwillbeoperatedpublishesthesystemandoperationsconceptdocumentandconductsasystemconceptreviewSCR. FollowingtheSCRtheteamderives40requirementsforthesystemfromthehighlevelrequirementsandthesystemandoperationsconceptusingstructuredorobject-orientedanalysis.Theteamspecifiesthesoftwarefunctionsandalgorithmsneededtosatisfyeachdetailedrequirement. 38是
在软件项目管理中可以使用各种图形工具来辅助决策下面对Gantt图的描述中不正确的是______
51isasixbytesOSIlayer2addresswhichisburnedintoeverynetworkingdevicethatprovidesitsuniqueidentityforpointtopointcommunication. 52isaprofessionalorganizationofindividualsinmultipleprofessionswhichfocusesoneffortonlower-layerprotocols. 53functionswithtwolayersofprotocols.Itcanconnectnetworksofdifferentspeedsandcanbeadaptedtoanenvironmentasitexpands. 54isthepopularLANdevelopedunderthedirectionoftheIEEE802.5. 55isthepopularbackbonetechnologyfortransmittinginformationathighspeedwithahighleveloffaulttolerancewhichisdevelopedunderthedirectionofANSI. 51是
SpreadspectrumsimplymeansthatdataissentinsmallpiecesOveranumberofthe46frequenciesavailableforuseatanytimeinthespecifiedrange.Devicesusing47spreadspectrumDSSScommunicateby48eachbyteofdataintoseveralpartsandsendingthemconcurrentlyondifferent49.DSSSusesalotoftheavailable50about22megahertzMHz. 47是
SpreadspectrumsimplymeansthatdataissentinsmallpiecesOveranumberofthe46frequenciesavailableforuseatanytimeinthespecifiedrange.Devicesusing47spreadspectrumDSSScommunicateby48eachbyteofdataintoseveralpartsandsendingthemconcurrentlyondifferent49.DSSSusesalotoftheavailable50about22megahertzMHz. 49是
设某算法的计算时间可用递推关系式Tn=2Tn/2+n表示则该算法的时间复杂度为
MIDIenablespeopletouse11computersandelectronicmusicalinstruments.ThereareactuallythreecomponentstoMIDIthecommunications"12."theHardwareInterfaceandadistribution13called"StandardMIDIFiles".InthecontextoftheWWWthemostinterestingcomponentisthe14Format.InprincipleMIDIfilescontainsequencesofMIDIProtocolmessages.HoweverwhenMIDIProtocol15arestoredinMIDIfilestheeventsarealsotime-stampedforplaybackinthepropersequence.MusicdeliveredbyMIDIfilesisthemostcommonuseofMIDItoday. 11是
设一个包含Ⅳ个顶点E条边的简单有向图采用邻接矩阵存储结构矩阵元素A[i][j]等于1/0分别表示顶点i与顶点j之间有/无弧则该矩阵的元素数目为73其中非零元素数目为74 74处填
简单无向图的邻接矩阵是对称的可以对其进行压缩存储若无向图G有n个结点其邻接矩阵为A[1..n1..n]且压缩存储在B[1..k]中则k的值至少为20若按行压缩存储对称矩阵的上三角元素则当n等于10时边V6V3的信息存储在B[21]中 21处填
已知某二叉树的中序序列为CBDAEFI先序序列为ABCDEFI则该二叉树的高度为
在软件开发过程中常用图作为描述工具DFD就是面向46分析方法的描述工具在一套分层DFD中如果某一张图中有N个加工Process则这张图允许有47张子图在一张DFD图中任意两个加工之间48在画分层DFD时应注意保持49之间的平衡DFD中从系统的输入流到系统的输出流的一连串连续变换形成一种信息流这种信息流可分为50两大类
MIDIenablespeopletouse11computersandelectronicmusicalinstruments.ThereareactuallythreecomponentstoMIDIthecommunications"12."theHardwareInterfaceandadistribution13called"StandardMIDIFiles".InthecontextoftheWWWthemostinterestingcomponentisthe14Format.InprincipleMIDIfilescontainsequencesofMIDIProtocolmessages.HoweverwhenMIDIProtocol15arestoredinMIDIfilestheeventsarealsotime-stampedforplaybackinthepropersequence.MusicdeliveredbyMIDIfilesisthemostcommonuseofMIDItoday. 15是
下面关于哈夫曼树的叙述中正确的是
对于关键字序列2625723881859采用散列函数HKey=Keymod13构造散列表哈希表若采用线性探测的开放定址法解决冲突顺序地探查可用存储单元则关键字59所在散列表中的地址为
OriginallyintroducedbyNetscapeCommunications1areageneralmechanismwhichHTFPServersideapplicationssuchasCGI2canusetobothstoreandretrieveinformationontheHTTP3sideoftheconnection.BasicallyCookiescanbeusedtocompensateforthe4natureofHTTP.Theadditionofasimplepersistentclient-sidestatesignificantlyextendsthecapabilitiesofWWW-based5. 4是
对于哈希表如果将装填因子定义为表中装入的记录数与表的长度之比那么向表中加入新记录时
OriginallyintroducedbyNetscapeCommunications1areageneralmechanismwhichHTFPServersideapplicationssuchasCGI2canusetobothstoreandretrieveinformationontheHTTP3sideoftheconnection.BasicallyCookiescanbeusedtocompensateforthe4natureofHTTP.Theadditionofasimplepersistentclient-sidestatesignificantlyextendsthecapabilitiesofWWW-based5. 2是
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