



下载本文档
版权说明:本文档由用户提供并上传,收益归属内容提供方,若内容存在侵权,请进行举报或认领
文档简介
1、姓名:_ 班级:_ 学号:_-密-封 -线- 中级数据库系统工程师单项选择考试卷模拟_考试题考试时间:120分钟 考试总分:100分题号一二三四五总分分数遵守考场纪律,维护知识尊严,杜绝违纪行为,确保考试结果公正。1、一般来说,软件开发环境都具有层次式的结构,( )不是其中的一个层次结构。 ( )a.宿主层b.核心层c.用户层d.应用层2、现有四个作业,它们提交、运行情况如下表,若采用先来先服务(fcfs)算法进行作业调度,则其平均周转时间为( )a.4.0b.6.875c.9.125d.10.03、在以下有关经营性性互联网和公益性互联网的说法中不正确的是( )a.经营性互联网络应当享受同等的
2、资费政策b.经营性互联网络应当享受同等的技术支撑条件c.公益性互联网络是指为社会提供公益服务的,不以盈利为目的的互联网络d.公益性互联网络所使用信道的资费不能享受优惠政策4、若某一组数进栈的序列为123456,则该组数的出栈序列( )是436512;( )是132465。 ( )a.可能;可能b.可能;不可能c.不可能;可能d.不可能;不可能5、多形病毒指的是( )的计算机病毒。 ( )a.可在反病毒检测时隐藏自己b.每次感染都会改变自己c.可以通过不同的渠道进行传播d.可以根据不同环境造成不同破坏6、已知有关系“student”,则关系运算ane80(student)用sql语句表示为( )
3、( )a.select( * )from student where ave 80b.select( * ) from student having ave 80c.select(ave) from student where ave 80d.select(ave) from student having ave 807、求最短路径的floyd算法的时间复杂度为( )( )a.o(n)b.o(n+e)c.o(n2)d.o(n3)8、将数据库对象的操作权限授予用户,属于安全控制机制中的( )a.用户标识与鉴别b.自主存取控制c.强制存取控制d.审计9、在下列各项中( )不是数据仓库的基本特点。
4、( )a.数据仓库存储的信息是面向主题来组织的b.数据仓库中要有一处专门用来存储5至10年或更久的历史数据,以满足各种数据需求c.数据仓库中的数据具有一致性的特点d.数据仓库可进行改动10、如下所示,给定关系学籍表,则对于函数依赖关系“姓名学号”和“籍贯姓名”,该关系分别( )a.满足,满足b.满足,不满足c.不满足,满足d.不满足,不满足11、假设某磁盘的每个磁道划分成9个物理块,每块存放1个逻辑记录。逻辑记录。r0,r1,r8存放在同一个磁道上,记录的安排顺序如下表所示:如果磁盘的旋转速度为27ms/周,磁头当前处在r0的开始处。若系统顺序处理这些记录,使用单缓冲区,每个记录处理时间为3m
5、s,则处理这9个记录的最长时间为( )a.54msb.108msc.222msd.243ms12、部分匹配查询中有关通配符“%”的叙述中正确的是:( )a.“%”代表一个字符b.“%”代表多个字符c.“%”可以代表零个或多个字符d.“%”不能与“_”一同使用13、分布式数据库用户无需知道数据的物理位置,称为( )a.分片透明b.复制透明c.位置透明d.逻辑透明14、多媒体计算机图像文件格式分为静态图像文件格式和动态图像文件格式,( )属于静态图像文件格式。 ( )a.mpgb.avsc.jpgd.avi15、pc处理的音频信号主要是入耳能听得到的音频信号,它的频率范围是( )a.300hz34
6、00hzb.20hz20khzc.10hz20khzd.20hz44khz16、sql语句“院系号notin(”001”,”002”)”表示( )a.院系号=“001”and院系号=“002”b.院系号!=“001”and院系号!=“002”c.院系号=“001”or院系号=“002”d.院系号!=“001”or院系号!=“002”17、物理层传输的数据单位是( )a.比特b.包c.帧d.数据块18、对于下表所表示的关系,若转化为2nf,则为( )。(标下划线_的属性表示该关系的主键) ( )a.(系别代号,系别),(教师姓名,工作号,代课数目)b.(系别代号,教师姓名),(系别,工作号,代课
7、数目)c.(系别代号,系别),(代课数目,工作号,教师姓名)d.(教师姓名,系别代号),(工作号,系别,代课数目)19、软件维护是一项非常复杂和困难的工作,以下哪个不属于其表现( )a.以前的程序有错误b.读他人程序中的困难c.维护和开发人员不是一批人d.维护和开发的时间不同20、采用uml进行软件设计时,可用( )关系表示两类事物之间存在的特殊/一般关系,用聚集关系表示事物之间存在的整体/部分关系。 ( )a.依赖b.聚集c.泛化d.实现21、对于无序接收的滑动窗口协议,若序号位数为n,则发送窗口最大尺寸为( )( )a.2n-1b.2nc.2n-1d.2n-122、目前,被国际社会广泛认可
8、和应用的通用压缩编码标准大致有如下四种:( )a.jpg、mpg、dmif和iecb.jpeg、mpeg、bmp和dvic.h.261、jpeg、mpeg和dvid.h.261、mpg、iec和dvi23、在internet与intranet之间,由( )负责对网络服务请求的合法性进行检查。 ( )a.防火墙b.集线器c.服务器d.路由器24、tcp/ip体系结构中的tcp和ip所提供的服务分别为( )a.链路层服务和网络层服务b.网络层服务和运输层服务c.运输层服务和应用层服务d.运输层服务和网络层服务25、在统一建模语言(uml)中,( )用于描述系统与外部系统及用户之间的交互。 ( )a
9、.类图b.用例图c.对象图d.协作图26、在关系中的各元组的( )a.顺序不能任意排列,一定要按照输入的顺序排列b.顺序可以任意排列c.顺序一定要按照关键字段值的顺序排列d.排列顺序不同,统计处理的结果就可能不同27、从计算机系统执行程序的角度看,并行性等级由高到低可分为( )四类。 ( )a.任务或进程之间,作业或程序之间,指令内部,指令之间b.任务或进程之间,作业或程序之间,指令之间,指令内部c.作业或程序之间,任务或进程之间,指令内部,指令之间d.作业或程序之间,任务或进程之间,指令之间,指令内部28、下列排序算法中,时间复杂度为o(nlog2n)且占用额外空间最少的是( )a.堆排序b
10、.冒泡排序c.快速排序d.shell排序29、sql-99标准规定的事务的四个隔离级别中,能解决幻影读现象的级别是( )a.read uncommittedb.read committedc.repeatable readd.serializable30、在人工管理阶段,数据是( );而在数据库系统阶段,数据是( )a.无结构的;有结构的b.无结构的;整体结构化的c.整体无结构的;有结构的d.整体尤结构的;整体结构化的31、the simple network management protocol (snmp)is an ( ) protocol that facilitates the e
11、xchange of management information between ( ) . it is part of the transmission control protocol/internet protocol(tcp/ip) protocol suite. snmp enables network ( ) to manage network performance, find and sole network problems, and plan for ( ) an snmp -managed network consists of three key components
12、: managed devices , ( ) ,and network -management systems .the simple network management protocol (snmp)is an ( ). ( )a.physical layerb.link layerc.network layerd.transport layer32、the simple network management protocol (snmp)is an ( ) protocol that facilitates the exchange of management information
13、between ( ) . it is part of the transmission control protocol/internet protocol(tcp/ip) protocol suite. snmp enables network ( ) to manage network performance, find and sole network problems, and plan for ( ) an snmp -managed network consists of three key components: managed devices , ( ) ,and netwo
14、rk -management systems .protocol that facilitates the exchange of management information between ( )a.network stationsb.network clientsc.network devicesd.network servers33、the simple network management protocol (snmp)is an ( ) protocol that facilitates the exchange of management information between
15、( ) . it is part of the transmission control protocol/internet protocol(tcp/ip) protocol suite. snmp enables network ( ) to manage network performance, find and sole network problems, and plan for ( ) an snmp -managed network consists of three key components: managed devices , ( ) ,and network -mana
16、gement systems .snmp enables network ( ) to manage network performance. ( )a.serversb.administratorsc.computersd.routers34、the simple network management protocol (snmp)is an ( ) protocol that facilitates the exchange of management information between ( ) . it is part of the transmission control prot
17、ocol/internet protocol(tcp/ip) protocol suite. snmp enables network ( ) to manage network performance, find and sole network problems, and plan for ( ) an snmp -managed network consists of three key components: managed devices , ( ) ,and network -management systems .and plan for ( ) an snmp -managed
18、 network consists of three key components: managed devices. ( )a.network growthb.network structurec.network architectured.network servers35、the simple network management protocol (snmp)is an ( ) protocol that facilitates the exchange of management information between ( ) . it is part of the transmis
19、sion control protocol/internet protocol(tcp/ip) protocol suite. snmp enables network ( ) to manage network performance, find and sole network problems, and plan for ( ) an snmp -managed network consists of three key components: managed devices , ( ) ,and network -management systems .( ) ,and network
20、 -management systems . ( )a.administratorsb.agentsc.managersd.servers36、计算机的使用方式有如下的( )方式。其中,( )方式是把一批数据集中起来,通过通信线路传送到计算中心,由批处理程序加以处理。批处理远程批处理双机实时分时网络计算机的使用方式有如下的( )方式。 ( )a.b.c.d.37、计算机的使用方式有如下的( )方式。其中,( )方式是把一批数据集中起来,通过通信线路传送到计算中心,由批处理程序加以处理。批处理远程批处理双机实时分时网络其中,( )方式是把一批数据集中起来,通过通信线路传送到计算中心,由批处理程序
21、加以处理。 ( )a.远程批处理b.批处理c.双机d.分时38、object-oriented analysis (ooa) is a semiformal specification technique for the object-oriented paradigm. object-oriented analysis consists of three steps. the first step is ( ) . it determines how the various results are computed by the product and presents this infor
22、mation in the form of a ( ) . and associated scenarios. the second is ( ) , which determines the classes and their attributes; then determine the interrelationships and interaction among the classes. the last step is ( ) , which determines the actions performed by or to each class or subclass and pr
23、esents this information in the form of ( ) .the first step is ( ). ( )a.use-case modelingb.class modelingc.dynamic modelingd.behavioral modeling39、object-oriented analysis (ooa) is a semiformal specification technique for the object-oriented paradigm. object-oriented analysis consists of three steps
24、. the first step is ( ) . it determines how the various results are computed by the product and presents this information in the form of a ( ) . and associated scenarios. the second is ( ) , which determines the classes and their attributes; then determine the interrelationships and interaction amon
25、g the classes. the last step is ( ) , which determines the actions performed by or to each class or subclass and presents this information in the form of ( ) .it determines how the various results are computed by the product and presents this information in the form of a ( ) . ( )a.collaboration dia
26、gramb.sequence diagramc.use-case diagramd.activity diagram40、object-oriented analysis (ooa) is a semiformal specification technique for the object-oriented paradigm. object-oriented analysis consists of three steps. the first step is ( ) . it determines how the various results are computed by the pr
27、oduct and presents this information in the form of a ( ) . and associated scenarios. the second is ( ) , which determines the classes and tlthe second is ( ) , which determines the classes and their attributes. ( )a.use-case modelingb.class modelingc.dynamic modelingd.behavioral modeling41、object-or
28、iented analysis (ooa) is a semiformal specification technique for the object-oriented paradigm. object-oriented analysis consists of three steps. the first step is ( ) . it determines how the various results are computed by the product and presents this information in the form of a ( ) . and associa
29、ted scenarios. the second is ( ) , which determines the classes and their attributes; then determine the interrelationships and interaction among the classes. the last step is ( ) , which determines the actions performed by or to each class or subclass and presents this information in the form of (
30、) .the last step is ( )a.use-case modelingb.class modelingc.dynamic modelingd.behavioral modeling42、object-oriented analysis (ooa) is a semiformal specification technique for the object-oriented paradigm. object-oriented analysis consists of three steps. the first step is ( ) . it determines how the
31、 various results are computed by the product and presents this information in the form of a ( ) . and associated scenarios. the second is ( ) , which determines the classes and their attributes; then determine the interrelationships and interaction among the classes. the last step is ( ) , which det
32、ermines the actions performed by or to each class or subclass and presents this information in the form of ( ) .which determines the actions performed by or to each class or subclass and presents this information in the form of ( )a.activity diagramb.component diagramc.sequence diagramd.state diagra
33、m43、某进程有5个页面,页号为04,页面变换表如下所示。表中状态位等于0和1分别表示页面“不在内存”和“在内存”。若系统给该进程分配了3个存储块,当访问的页面3不在内存时,应该淘汰表中页号为( )的页面。假定页面大小为4k,逻辑地址为十六进制2c25h,该地址经过变换后,其物理地址应为卜六进制( )。若系统给该进程分配了3个存储块,当访问的页面3不在内存时,应该淘汰表中页号为( )的页面。 ( )b.1c.2d.444、某进程有5个页面,页号为04,页面变换表如下所示。表中状态位等于0和1分别表示页面“不在内存”和“在内存”。若系统给该进程分配了3个存储块,当访问的页面3不在内存时,应该淘汰
34、表中页号为( )的页面。假定页面大小为4k,逻辑地址为十六进制2c25h,该地址经过变换后,其物理地址应为卜六进制( )。假定页面大小为4k,逻辑地址为十六进制2c25h,该地址经过变换后,其物理地址应为卜六进制( )a.2c25hb.4096hc.4c25hd.8c25h45、数据模型的三要素指( );其中( )是对数据系统的静态特性的描述,( )是对数据库系统的动态特性的描述。数据模型的三要素指( )a.数据类型,数据值,数据操作b.数据类型,数据值,数据结构c.数据结构,数据操作,数据完整性约束d.数据类型,数据结构,数据完整性约束46、数据模型的三要素指( );其中( )是对数据系统的
35、静态特性的描述,( )是对数据库系统的动态特性的描述。其中( )是对数据系统的静态特性的描述。 ( )a.数据值b.数据类型c.数据结构d.数据操作47、数据模型的三要素指( );其中( )是对数据系统的静态特性的描述,( )是对数据库系统的动态特性的描述。( )是对数据库系统的动态特性的描述。 ( )a.数据值b.数据类型c.数据结构d.数据操作48、as mentioned above, c imposes relatively few built - in ways of doing things on the program- mer. some common tasks, such
36、as manipulating (1) , (2), and doing (3) (i/o), are performed by calling on library functions. other tasks which you might want to do, such as creating or listing directories, or interacting with a mouse, or displaying windows or other (4) elements, or doing color graphics, are not defined by the c
37、language at all. you can do these things from a c program, of course, but you will be calling on services which are peculiar to your programming environment (5), processor, and operating system) and which are not defined by the c standard. since this course is about portable c programming, it will a
38、lso be steering clear of facilities not provided in all c environments.(1)处应选择( )a.linesb.stringsc.threadsd.routes49、as mentioned above, c imposes relatively few built - in ways of doing things on the program- mer. some common tasks, such as manipulating (1) , (2), and doing (3) (i/o), are performed
39、 by calling on library functions. other tasks which you might want to do, such as creating or listing directories, or interacting with a mouse, or displaying windows or other (4) elements, or doing color graphics, are not defined by the c language at all. you can do these things from a c program, of
40、 course, but you will be calling on services which are peculiar to your programming environment (5), processor, and operating system) and which are not defined by the c standard. since this course is about portable c programming, it will also be steering clear of facilities not provided in all c env
41、ironments.(2)处应选择( )a.allocating storageb.allocating memoryc.distributing memoryd.assigning storage50、as mentioned above, c imposes relatively few built - in ways of doing things on the program- mer. some common tasks, such as manipulating (1) , (2), and doing (3) (i/o), are performed by calling on
42、library functions. other tasks which you might want to do, such as creating or listing directories, or interacting with a mouse, or displaying windows or other (4) elements, or doing color graphics, are not defined by the c language at all. you can do these things from a c program, of course, but yo
43、u will be calling on services which are peculiar to your programming environment (5), processor, and operating system) and which are not defined by the c standard. since this course is about portable c programming, it will also be steering clear of facilities not provided in all c environments.(3)处应
44、选择( )a.input/outputb.inoptimization/optimizationc.inside/outsided.inordinacy/ordinance51、as mentioned above, c imposes relatively few built - in ways of doing things on the program- mer. some common tasks, such as manipulating (1) , (2), and doing (3) (i/o), are performed by calling on library funct
45、ions. other tasks which you might want to do, such as creating or listing directories, or interacting with a mouse, or displaying windows or other (4) elements, or doing color graphics, are not defined by the c language at all. you can do these things from a c program, of course, but you will be cal
46、ling on services which are peculiar to your programming environment (5), processor, and operating system) and which are not defined by the c standard. since this course is about portable c programming, it will also be steering clear of facilities not provided in all c environments.(4)处应选择( )a.user -
47、 interconnectb.person - interconnectc.user - interfaced.person - interface52、as mentioned above, c imposes relatively few built - in ways of doing things on the program- mer. some common tasks, such as manipulating (1) , (2), and doing (3) (i/o), are performed by calling on library functions. other
48、tasks which you might want to do, such as creating or listing directories, or interacting with a mouse, or displaying windows or other (4) elements, or doing color graphics, are not defined by the c language at all. you can do these things from a c program, of course, but you will be calling on serv
49、ices which are peculiar to your programming environment (5), processor, and operating system) and which are not defined by the c standard. since this course is about portable c programming, it will also be steering clear of facilities not provided in all c environments.(5)处应选择( )a.gathererb.translat
50、orc.generatord.compiler53、一条指令的执行可划分成取值,分析和执行三个部分,不同的部分由不同自由独立的硬件完成设每一指令完成取值,分析和执行三部分的时间分别为2ns,3ns,1ns现有100条指令,若顺序执行这些指令需要( );若采用流水方式执行这些指令则需要( )。一条指令的执行可划分成取值,分析和执行三个部分,不同的部分由不同自由独立的硬件完成设每一指令完成取值,分析和执行三部分的时间分别为2ns,3ns,1ns现有100条指令,若顺序执行这些指令需要( )a.200nsb.300nsc.500nsd.600ns54、一条指令的执行可划分成取值,分析和执行三个部分,
51、不同的部分由不同自由独立的硬件完成设每一指令完成取值,分析和执行三部分的时间分别为2ns,3ns,1ns现有100条指令,若顺序执行这些指令需要( );若采用流水方式执行这些指令则需要( )。若采用流水方式执行这些指令则需要( )a.291nsb.293nsc.303nsd.311ns55、数据的独立性是指( )是相互独立的;它又可分为( )。它又可分为( )a.内存数据独立性和外存数据独立性b.逻辑数据独立性和物理数据独立性c.数据库数据独立性和数据库外数据独立性d.结构化数据独立性和非结构化数据独立性56、数据的独立性是指( )是相互独立的;它又可分为( )。数据的独立性是指( )是相互独
52、立的。 ( )a.数据的存储位置和数据值b.操作系统和数据库中的数据c.用户的应用程序和存储在外存上的数据库中的数据d.以上均不对57、等值连接可由基本的关系运算( )等价表达。给定关系贯、s如下图所示,则rs=( )。等值连接可由基本的关系运算( )等价表达。 ( )a.、和b.-、和c.、和d.、和58、等值连接可由基本的关系运算( )等价表达。给定关系贯、s如下图所示,则rs=( )。给定关系贯、s如下图所示,则rs=( )a.b.c.d.59、数据库数据字典由(1)组成,它(2)。(1)处应选择( )a.关系和操作b.数据、关系和操作c.基本表和用户可存取的视图d.系统人员可存取的数据
53、和用户可存取的视图60、数据库数据字典由(1)组成,它(2)。(2)处应选择( )a.只读b.可读可写c.不同的数据库不同d.以上均不对61、某超市的商品(商品号,商品名称,生产商,单价)和仓库(仓库号,地址,电话,商品号,库存量)两个基本关系如表1和表2所示。a仓库关系的主键是(37),该关系没有达到第三范式的原因是(38);b查询联想生产的激光打印机的总库存量的sql语句如下:select商品名称,(39)from商品,仓库where(40)and(41);c若仓库关系的地址不能为空,请将下述仓库关系sql语句的空缺部分补充完整。createtable仓库(仓库号char(2),地址char(20)(42),电话char(20),商品号char(5),库存量numeric(5),(43),(44);(37)处应选择( )a.仓库号b.商品号,地址c.仓库号,地址d.仓库号,商品号62、某超市的商品(商品号,商品名称,生产商,单价)和仓库(仓库号,地址,电话,商品号,库存量)两个基本关系如表1和表2所示。a仓库关系的主键是(37),该关系没有达到第三范式的原因是(38);b查询联想生产的激光打印机的总库存量的sql语句如下:select商品名称,(39)from商品,仓库where(40)and(41);c若仓库关系的地址不能为空,请将下述仓库关系sql语句的空
温馨提示
- 1. 本站所有资源如无特殊说明,都需要本地电脑安装OFFICE2007和PDF阅读器。图纸软件为CAD,CAXA,PROE,UG,SolidWorks等.压缩文件请下载最新的WinRAR软件解压。
- 2. 本站的文档不包含任何第三方提供的附件图纸等,如果需要附件,请联系上传者。文件的所有权益归上传用户所有。
- 3. 本站RAR压缩包中若带图纸,网页内容里面会有图纸预览,若没有图纸预览就没有图纸。
- 4. 未经权益所有人同意不得将文件中的内容挪作商业或盈利用途。
- 5. 人人文库网仅提供信息存储空间,仅对用户上传内容的表现方式做保护处理,对用户上传分享的文档内容本身不做任何修改或编辑,并不能对任何下载内容负责。
- 6. 下载文件中如有侵权或不适当内容,请与我们联系,我们立即纠正。
- 7. 本站不保证下载资源的准确性、安全性和完整性, 同时也不承担用户因使用这些下载资源对自己和他人造成任何形式的伤害或损失。
最新文档
- 快递网络车运输合同范本
- 打印购房合同协议书范本
- 铝扣板吊顶劳务合同范本
- 浙江省“七彩阳光”2026届化学高二第一学期期中监测试题含解析
- 2026届福建省尤溪县第七中学高二化学第一学期期中统考试题含解析
- 海南省2026届高三化学第一学期期中考试试题含解析
- 2026届北京市西城区第四中学化学高二上期中考试模拟试题含解析
- 农田承包托管合同范本
- 济宁市2024-2025学年九年级上学期语文期末模拟试卷
- 集安市2024-2025学年七年级上学期语文月考测试试卷
- 2025年放射工作人员培训考试试题及答案
- 2025-2030超大型矿用卡车电动化转型技术路线及成本效益分析
- 2025-2026学年统编版(2024)小学语文一年级上册教学计划及进度表
- 2025至2030中国太阳能发电中的水泵行业发展趋势分析与未来投资战略咨询研究报告
- 剖析我国公立医院管理体制:问题洞察与改革路径探究
- 2025年药品监管与安全知识考试卷及答案
- 大讲堂+管理办法
- 高中班级常规管理课件
- 销售部区域划分管理办法
- 2025年法院书记员招聘考试笔试试题附答案
- 超声波龈下刮治术专题讲解
评论
0/150
提交评论