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某台按字节编址的8位计算机系统中,采用虚拟页式存储管理方案,页面的大小为1KB,且系统中没有使用快表(或联想存储器)。如图7-3所示的是划分成6个页面的用户程序。 图7-3中“swap A,B”是1...
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微型计算机的内存储器是
按二进制位编址
按字节编址
按字长编址
按十进制位编址
假定某采用页式虚拟存储管理的计算机系统中主存储器容量为1GB被分为262144块物理块物理块号为01
在一台按字节编址的8位计算机系统中采用虚拟页式存储管理方案页面的大小为1KB且系统中没有使用快
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假设一台按字节编址的16位计算机系统采用虚拟页式存储管理方案页面的大小为2K且系统中没有使用快
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某一计算机系统采用段页式虚拟存储器方式已知虚拟地址有32位按字编址每一字段最多可以有1KB每页16K
在一台按字节编址的8位计算机系统中采用虚拟页式存储管理方案页面的大小为1KB且系统中没有使用快
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某一计算机系统采用段页式虚拟存储器方式已知虚拟地址有32位按字编址每一字段最多可以有1KB每页16K
一个64位的计算机系统中地址线宽为64位实际使用的虚拟地址空间的大小是248若采用虚拟页式存储管理每
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某台按字节编址的8位计算机系统中采用虚拟页式存储管理方案页面的大小为1KB且系统中没有使用快表或联
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假设一台按字节编址的16位计算机系统采用虚拟页式存储管理方案页面的大小为2K且系统中没有使用快
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在一台按字节编址的8位计算机系统中采用虚拟页式存储管理方案页面的大小为1KB且系统中没有使用快
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假设一台按字节编址的16位计算机系统采用虚拟页式存储管理方案页面的大小为2K且系统中没有使用
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某一计算机系统采用段页式虚拟存储器方式已知虚拟地址有32位按字编址每一字段最多可以有1KB每页16K
在一台按字节编址的8位计算机系统中采用虚拟页式存储管理方案页面的大小为1KB且系统中没有使用快
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某台按字节编址的8位计算机系统中采用虚拟页式存储管理方案页面的大小为1KB且系统中没有使用快表或联
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某一计算机系统采用段页式虚拟存储器方式已知虚拟地址有32位按字编址每个字段最多可以有1K字每页16K
微型计算机的内存储器是
按十进制位编址
按字节编址
按字长编址
按十进制位编址
某台按字节编址的8位计算机系统中采用虚拟页式存储管理方案页面的大小为1KB且系统中没有使用快表或联
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某计算机主存按字节编址逻辑地址和物理地址都是32位页表项大小为4字节请回答下列问题 若使用
某一计算机系统采用段页式虚拟存储器方式已知虚拟地址有32位按字编址每一字段最多可以有1KB每页
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Comparisonsweredrawnbetweenthedevelopmentoftelevisioninthe20thcenturyandthediffusionofprintinginthe15thand16thcenturies.Yetmuchhadhappenedbetween.Aswasdiscussedbeforeitwasnotuntilthe19thcenturythatthenewspaperbecamethedominantpre-electronic61followinginthewakeofthepamphletandthebookandinthe62oftheperiodical.Itwasduringthesametimethatthecommunicationsrevolution63UPbeginningwithtransporttherailwayandleadingonthroughthetelegraphthetelephoneradioandmotionpicturesintothe20th-centuryworldofthemotorcarandtheairplane.Noteveryoneseesthatprocessin64.Itisimportanttodoso. Itisgenerallyrecognized65thattheintroductionofthecomputerintheearly20thcentury66bytheinventionoftheintegratedcircuitduringthe1960sradicallychangedtheprocessalthoughitsimpactonthemediawasnotimmediately67.Astimewentbycomputersbecamesmallerandmorepowerfulandtheybecame"personal"tooaswellas68withdisplaybecomingsharperandstorage69increasing.Theywerethoughtoflikepeople70generationswiththedistancebetweengenerationsmuch71. Itwaswithinthecomputeragethattheterm"informationsociety"begantobewidelyusedtodescribethe72withinwhichwenowlive.Thecommunicationsrevolutionhas73bothworkandleisureandhowwethinkandfeelbothaboutplaceandtimebuttherehavebeen74viewaboutitseconomicpoliticalsocialandculturalimplications."Benefits"havebeenweighed75"harmful"outcomes.Andgeneralizationshaveproveddifficult. 66是
CMM模型将软件过程的成熟度分为5个等级在17已建立了基本的项目管理过程可对成本进度和功能特性进行跟踪在18用于软件管理与工程两方面的软件过程均已文档化标准化并形成了整个软件组织的标准软件过程
进程P1P2P3P4和P5的前趋图如下 若用PV操作控制进程P1~P5并发执行的过程则需要设置6个信号量S1S2S3S4S5和S6且信号量S1~S6的初值都等于零下图中a和b处应分别填写23c和d处应分别填写24e和f处应分别填写25 23是
使用______DPI的分辨率扫描一幅2×4英寸的照片可以得到一幅300×600像素的图像
71analysisemphasizesthedrawingofpictorialsystemmodelstodocumentandvalidatebothexistingand/orproposedsystems.Ultimatelythesystemmodelsbecomethe72fordesigningandconstructinganimprovedsystem.73issuchatechnique.Theemphasisinthistechniqueisprocess-centered.Systemsanalystsdrawaseriesofprocessmodelscalled74.75isanothersuchtechniquethatintegratesdataandprocessconcernsintoconstructscalledobjects. 71是
Comparisonsweredrawnbetweenthedevelopmentoftelevisioninthe20thcenturyandthediffusionofprintinginthe15thand16thcenturies.Yetmuchhadhappenedbetween.Aswasdiscussedbeforeitwasnotuntilthe19thcenturythatthenewspaperbecamethedominantpre-electronic61followinginthewakeofthepamphletandthebookandinthe62oftheperiodical.Itwasduringthesametimethatthecommunicationsrevolution63UPbeginningwithtransporttherailwayandleadingonthroughthetelegraphthetelephoneradioandmotionpicturesintothe20th-centuryworldofthemotorcarandtheairplane.Noteveryoneseesthatprocessin64.Itisimportanttodoso. Itisgenerallyrecognized65thattheintroductionofthecomputerintheearly20thcentury66bytheinventionoftheintegratedcircuitduringthe1960sradicallychangedtheprocessalthoughitsimpactonthemediawasnotimmediately67.Astimewentbycomputersbecamesmallerandmorepowerfulandtheybecame"personal"tooaswellas68withdisplaybecomingsharperandstorage69increasing.Theywerethoughtoflikepeople70generationswiththedistancebetweengenerationsmuch71. Itwaswithinthecomputeragethattheterm"informationsociety"begantobewidelyusedtodescribethe72withinwhichwenowlive.Thecommunicationsrevolutionhas73bothworkandleisureandhowwethinkandfeelbothaboutplaceandtimebuttherehavebeen74viewaboutitseconomicpoliticalsocialandculturalimplications."Benefits"havebeenweighed75"harmful"outcomes.Andgeneralizationshaveproveddifficult. 68是
IP协议是TCP/IP体系结构20上的实用的协议TCP协议是TCP/IP体系结构21上使用的协议TCP/IP体系结构的22上没有专用的协议SUP协议位于TCP/IP体系结构的23 20是
如果读取23的某磁盘块修改后在写回磁盘前系统崩溃则对系统的影响相对较大
Comparisonsweredrawnbetweenthedevelopmentoftelevisioninthe20thcenturyandthediffusionofprintinginthe15thand16thcenturies.Yetmuchhadhappenedbetween.Aswasdiscussedbeforeitwasnotuntilthe19thcenturythatthenewspaperbecamethedominantpre-electronic61followinginthewakeofthepamphletandthebookandinthe62oftheperiodical.Itwasduringthesametimethatthecommunicationsrevolution63UPbeginningwithtransporttherailwayandleadingonthroughthetelegraphthetelephoneradioandmotionpicturesintothe20th-centuryworldofthemotorcarandtheairplane.Noteveryoneseesthatprocessin64.Itisimportanttodoso. Itisgenerallyrecognized65thattheintroductionofthecomputerintheearly20thcentury66bytheinventionoftheintegratedcircuitduringthe1960sradicallychangedtheprocessalthoughitsimpactonthemediawasnotimmediately67.Astimewentbycomputersbecamesmallerandmorepowerfulandtheybecame"personal"tooaswellas68withdisplaybecomingsharperandstorage69increasing.Theywerethoughtoflikepeople70generationswiththedistancebetweengenerationsmuch71. Itwaswithinthecomputeragethattheterm"informationsociety"begantobewidelyusedtodescribethe72withinwhichwenowlive.Thecommunicationsrevolutionhas73bothworkandleisureandhowwethinkandfeelbothaboutplaceandtimebuttherehavebeen74viewaboutitseconomicpoliticalsocialandculturalimplications."Benefits"havebeenweighed75"harmful"outcomes.Andgeneralizationshaveproveddifficult. 70是
71analysisemphasizesthedrawingofpictorialsystemmodelstodocumentandvalidatebothexistingand/orproposedsystems.Ultimatelythesystemmodelsbecomethe72fordesigningandconstructinganimprovedsystem.73issuchatechnique.Theemphasisinthistechniqueisprocess-centered.Systemsanalystsdrawaseriesofprocessmodelscalled74.75isanothersuchtechniquethatintegratesdataandprocessconcernsintoconstructscalledobjects. 73是
原型化方法是一类动态定义需求的方法44不是原型化方法所具有的特征与结构化方法相比原型化方法更需要45衡量原型开发人员能力的重要标准是46
Ink-jetprinterbelongstononimpactprintersinwhichthecharactersareformedbyprojectingparticlesordropletsofinkontopaper.71printerisalsoan0nimpactprinterinwhichthecharactersareproducedbyapplyinghotelementstoheat-sensitivepaperdirectlyorbymeltinginkfroma72ontoplainpaper.Electrostaticprintercreatesanelectrostaticlatentimagewhichisthenmadevisiblebyatonerandtransferredandfixedonpaper.Anelectrostaticprintermaybeusedinsomeinstancesasa73.Laserprintercreatesbymeansofalaserbeamdirectedona74surfacealatentimagewhichisthenmadevisiblebyatonerandtransferredandfixedonpaper.Magnetographicprintercreatesbymeansofmagneticheadsoperatingonametallicdrumalatentimagewhichisthenmadevisiblebyatonerandtransferredandfixedonpaper.Computer-output-microfilmCOMprinterproducesonaphotographicfilma75ofeachpage. 73是
50模式将对象组合成树形结构以表示部分一整体的层次结构并使得用户对单个对象和组合对象的使用具有一致性
Thesoftwarearchitectureofaprogramorcomputingsystemisthestructureorstructuresofthesystemwhichcomprisesoftware1theexternally2propertiesofthosecomponentsandtherelationshipsbetweenthem.Thearchitectureisnottheoperationalsoftware.Ratheritisa3thatenablesasoftwareengineerto:analyzethe4ofthedesigninmeetingitsstatedrequirementsconsiderarchitecturalalternativesatastagewhenmakingdesignchangesisstillrelativelyeasyandreducethe5associatedwiththeconstructionofthesoftware. 5是
IP协议是TCP/IP体系结构20上的实用的协议TCP协议是TCP/IP体系结构21上使用的协议TCP/IP体系结构的22上没有专用的协议SUP协议位于TCP/IP体系结构的23 22是
______标准规定了彩色电视图像转换成数字图像所使用的采样频率采样结构彩色空间转换等
程序设计语言包括41等几个方面它的基本成分包括42Chomsky乔姆斯基提出了形式语言的分层理论他定义了四类文法短语结构文法上下文有关文法上下文无关文法和正则文法一个文法可以用一个四元组G=∑VSP表示其中∑是终结符的有限字符表y是非终结符的有限字母表S∈V是开始符号P是生成式的有限非空集在短语文法中P中的生成式都是α→β甲的形式其中α∈43β∈∑∪V*在上下文有关文法中户中的生成式都是α1Aα2→α1βα2的形式其中A∈44β∈∑∪V*β≠在上下文无关文法中户中的生成式的左部正45 44是
进程P1P2P3P4和P5的前趋图如下 若用PV操作控制进程P1~P5并发执行的过程则需要设置6个信号量S1S2S3S4S5和S6且信号量S1~S6的初值都等于零下图中a和b处应分别填写23c和d处应分别填写24e和f处应分别填写25 25是
Thesoftwarearchitectureofaprogramorcomputingsystemisthestructureorstructuresofthesystemwhichcomprisesoftware1theexternally2propertiesofthosecomponentsandtherelationshipsbetweenthem.Thearchitectureisnottheoperationalsoftware.Ratheritisa 3thatenablesasoftwareengineerto:analyzethe4ofthedesigninmeetingitsstatedrequirementsconsiderarchitecturalalternativesatastagewhenmakingdesignchangesisstillrelativelyeasyandreducethe5associatedwiththeconstructionofthesoftware. 1是
程序设计语言包括41等几个方面它的基本成分包括42Chomsky乔姆斯基提出了形式语言的分层理论他定义了四类文法短语结构文法上下文有关文法上下文无关文法和正则文法一个文法可以用一个四元组G=∑VSP表示其中∑是终结符的有限字符表y是非终结符的有限字母表S∈V是开始符号P是生成式的有限非空集在短语文法中P中的生成式都是α→β甲的形式其中α∈43β∈∑∪V*在上下文有关文法中户中的生成式都是α1Aα2→α1βα2的形式其中A∈44β∈∑∪V*β≠在上下文无关文法中户中的生成式的左部正45 42是
Ink-jetprinterbelongstononimpactprintersinwhichthecharactersareformedbyprojectingparticlesordropletsofinkontopaper.71printerisalsoan0nimpactprinterinwhichthecharactersareproducedbyapplyinghotelementstoheat-sensitivepaperdirectlyorbymeltinginkfroma72ontoplainpaper.Electrostaticprintercreatesanelectrostaticlatentimagewhichisthenmadevisiblebyatonerandtransferredandfixedonpaper.Anelectrostaticprintermaybeusedinsomeinstancesasa73.Laserprintercreatesbymeansofalaserbeamdirectedona74surfacealatentimagewhichisthenmadevisiblebyatonerandtransferredandfixedonpaper.Magnetographicprintercreatesbymeansofmagneticheadsoperatingonametallicdrumalatentimagewhichisthenmadevisiblebyatonerandtransferredandfixedonpaper.Computer-output-microfilmCOMprinterproducesonaphotographicfilma75ofeachpage. 71是
著名的软件工程专家Boehm于1983年提出了软件工程的七条基本原理用分阶段的生命周期计划严格管理10实行严格的产品控制采用现代程序设计技术明确责任11承认不断改进软件工程实践的必要性注意答案须按顺序排列
在某系统中采用连续分配策略假设文件从下面指定的物理地址开始存储假设块号从1开始如果起始物理块号1000逻辑块号12和逻辑块相对应的物理块号5起始物理块号75逻辑块号2000和逻辑块相对应的块物理号6起始物理块号150逻辑块号25和逻辑块相对应的块物理号7 6是
Comparisonsweredrawnbetweenthedevelopmentoftelevisioninthe20thcenturyandthediffusionofprintinginthe15thand16thcenturies.Yetmuchhadhappenedbetween.Aswasdiscussedbeforeitwasnotuntilthe19thcenturythatthenewspaperbecamethedominantpre-electronic61followinginthewakeofthepamphletandthebookandinthe62oftheperiodical.Itwasduringthesametimethatthecommunicationsrevolution63UPbeginningwithtransporttherailwayandleadingonthroughthetelegraphthetelephoneradioandmotionpicturesintothe20th-centuryworldofthemotorcarandtheairplane.Noteveryoneseesthatprocessin64.Itisimportanttodoso. Itisgenerallyrecognized65thattheintroductionofthecomputerintheearly20thcentury66bytheinventionoftheintegratedcircuitduringthe1960sradicallychangedtheprocessalthoughitsimpactonthemediawasnotimmediately67.Astimewentbycomputersbecamesmallerandmorepowerfulandtheybecame"personal"tooaswellas68withdisplaybecomingsharperandstorage69increasing.Theywerethoughtoflikepeople70generationswiththedistancebetweengenerationsmuch71. Itwaswithinthecomputeragethattheterm"informationsociety"begantobewidelyusedtodescribethe72withinwhichwenowlive.Thecommunicationsrevolutionhas73bothworkandleisureandhowwethinkandfeelbothaboutplaceandtimebuttherehavebeen74viewaboutitseconomicpoliticalsocialandculturalimplications."Benefits"havebeenweighed75"harmful"outcomes.Andgeneralizationshaveproveddifficult. 62是
Comparisonsweredrawnbetweenthedevelopmentoftelevisioninthe20thcenturyandthediffusionofprintinginthe15thand16thcenturies.Yetmuchhadhappenedbetween.Aswasdiscussedbeforeitwasnotuntilthe19thcenturythatthenewspaperbecamethedominantpre-electronic61followinginthewakeofthepamphletandthebookandinthe62oftheperiodical.Itwasduringthesametimethatthecommunicationsrevolution63UPbeginningwithtransporttherailwayandleadingonthroughthetelegraphthetelephoneradioandmotionpicturesintothe20th-centuryworldofthemotorcarandtheairplane.Noteveryoneseesthatprocessin64.Itisimportanttodoso. Itisgenerallyrecognized65thattheintroductionofthecomputerintheearly20thcentury66bytheinventionoftheintegratedcircuitduringthe1960sradicallychangedtheprocessalthoughitsimpactonthemediawasnotimmediately67.Astimewentbycomputersbecamesmallerandmorepowerfulandtheybecame"personal"tooaswellas68withdisplaybecomingsharperandstorage69increasing.Theywerethoughtoflikepeople70generationswiththedistancebetweengenerationsmuch71. Itwaswithinthecomputeragethattheterm"informationsociety"begantobewidelyusedtodescribethe72withinwhichwenowlive.Thecommunicationsrevolutionhas73bothworkandleisureandhowwethinkandfeelbothaboutplaceandtimebuttherehavebeen74viewaboutitseconomicpoliticalsocialandculturalimplications."Benefits"havebeenweighed75"harmful"outcomes.Andgeneralizationshaveproveddifficult. 64是
71analysisemphasizesthedrawingofpictorialsystemmodelstodocumentandvalidatebothexistingand/orproposedsystems.Ultimatelythesystemmodelsbecomethe72fordesigningandconstructinganimprovedsystem.73issuchatechnique.Theemphasisinthistechniqueisprocess-centered.Systemsanalystsdrawaseriesofprocessmodelscalled74.75isanothersuchtechniquethatintegratesdataandprocessconcernsintoconstructscalledobjects. 75是
Thesoftwarearchitectureofaprogramorcomputingsystemisthestructureorstructuresofthesystemwhichcomprisesoftware1theexternally2propertiesofthosecomponentsandtherelationshipsbetweenthem.Thearchitectureisnottheoperationalsoftware.Ratheritisa3thatenablesasoftwareengineerto:analyzethe4ofthedesigninmeetingitsstatedrequirementsconsiderarchitecturalalternativesatastagewhenmakingdesignchangesisstillrelativelyeasyandreducethe5associatedwiththeconstructionofthesoftware. 3是
为了保障数据的存储和传输安全需要对一些重要数据进行加密由于对称密码算法22所以特别适合对大量的数据进行加密国际数据加密算法IDEA的密钥长度是23位
采用瀑布模型进行系统开发的过程中每个阶段都会产生不同的文档以下关于产生这些文档的描述中正确的是
Ink-jetprinterbelongstononimpactprintersinwhichthecharactersareformedbyprojectingparticlesordropletsofinkontopaper.71printerisalsoan0nimpactprinterinwhichthecharactersareproducedbyapplyinghotelementstoheat-sensitivepaperdirectlyorbymeltinginkfroma72ontoplainpaper.Electrostaticprintercreatesanelectrostaticlatentimagewhichisthenmadevisiblebyatonerandtransferredandfixedonpaper.Anelectrostaticprintermaybeusedinsomeinstancesasa73.Laserprintercreatesbymeansofalaserbeamdirectedona74surfacealatentimagewhichisthenmadevisiblebyatonerandtransferredandfixedonpaper.Magnetographicprintercreatesbymeansofmagneticheadsoperatingonametallicdrumalatentimagewhichisthenmadevisiblebyatonerandtransferredandfixedonpaper.Computer-output-microfilmCOMprinterproducesonaphotographicfilma75ofeachpage. 75是
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