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1、姓名:_ 班级:_ 学号:_-密-封 -线- 标签:标题考试时间: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。ld.不同域;同一个域4、王某是一名程序员,每当软件开发完成后均按公司规定完成软件文档,并上交公司存档,自己没有留存。因撰写论文的需要,王某向公司要求将软件文档原本借出复印,但遭到公司拒绝,理由是该软件文档属于职务作品,著作权归公司。以下叙述中,正确的是( )a.该软件文档属于职务作品,著作权归公司b.该软件文档不属于职务作品,程序员享有著作权c.该软件文档属于职务作品,但程序员享有复制权d.该软件文档不属于职务作品,
2、著作权由公司和程序员共同享有5、以下关于db,dbs和dbms三者之间的的关系正确的是( )a.db包括dbs和dbmsb.dbs包括db和dbmsc.dbms包括db和dbsd.db,dbs和dbms三者是并列关系6、采用全双工通信方式,数据传输的方向性结构为( )a.可以在两个方向上同时传输b.只能在一个方向上传输c.可以在两个方向上传输,但不能同时进行d.以上均不对7、银行系统采用分布式数据库系统,对本地储户的存储业务能够在本地正常进行,而不依赖于其他lb.方法c.存储过程d.数组10、为了避免流程图在描述程序逻辑时的灵活性,可以用方框图( )来代替传统的程序流程图。 ( )a.n-s图
3、b.pad图c.pfd图d.dfd图11、分配给某校园网的地址块是/18,该校园网包含( )个c类网络。 ( )a.6b.14c.30d.6212、采用异步传输方式,设数据位为7位,1位校验位,1位停止位,则其通信效率为( )a.30%b.70%c.77.8%d.20%13、推进游标的指令是( )a.openb.closec.fetchd.declare14、下面有关分页系统和分段系统的说法正确的是( )a.页是逻辑单位;段是物理单位b.页的大小可变;段的大小是固定的c.分页系统对用户可见;分段系统对用户透明d.分页系统具有单一地址空间;分段系统具有二维地址空间15、
4、若视频图像每帧的数据量为6.4mb,帧速率为30帧/秒,则显示10秒的视频信息,其原始数据量为( )mb。 ( )a.64b.192c.640d.192016、下列行为不属于网络攻击的是( )a.连续不停ping某台主机b.发送带病毒和木马的电子邮件c.向多个邮箱群发一封电子邮件d.暴力破解服务器密码17、在各种多媒体压缩编码技术中,简单而言,( )就是把高频率的数据用短码来表示,而频率低的就用相对长的编码来表示。 ( )a.统计编码b.预测编码c.变换编码d.自适应编码18、不同的数据模型是我们模型化数据和信息的不同工具,根据模型描述的内容和应用的层次不同,我们可对其进行划分。其中,( )主
5、要用于数据库设计。 ( )a.层次模型b.概念模型c.关系模型d.面向对象模型19、网络安全具有几方面的特性:( )指的是数据未经授权不允许进行改变。 ( )a.完整性b.可用性c.可控性d.保密性20、目前,被国际社会广泛认可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dvi21、系统为了管理文件,设置了专门的数据结构-文件控制块(fcb)。fcb是在执行下列( )系统调用时建立的。 ( )a.createb.openc.readd.write
6、22、unix与linux的主要区别是:( )a.unix是用c语言写的,而linux是用汇编语言写的b.linux unix的内核程序不相同c.unix主要是运行在微机上的,而linux主要是运行在小型机上的d.linux unix的用户界面完全不同23、在计算机体系结构中,cpu内部包括程序计数器pc、存储器数据寄存器mdr、指令寄存器ir和存储器地址寄存器mar等。若cpu要执行的指令为:mov r0,#100(即将数值100传送到寄存器r0中),则cpu首先要完成的操作是( )a.100r0b.100mdrc.pcmard.pcir24、一个栈的输入序列为12345,则下列序列中是栈的
7、输出序列的是( )a.23415b.54132c.31245d.1425325、对象数据库系统不具有( )的优点。 ( )a.可维护性好b.能有效地表达客观世界和查询信息c.解决了关系数据库运行中的一个典型问题,即应用程序语言与数据库管理系统对数据类型支持不一致的问题,即通常所说的“阻抗不匹配”(impedance mismatch)问题。d.面向对象的技术非常容易掌握26、一个数据库系统必须能表示实体和关系,关系可与( )实体有关。 ( )a.一个b.两个c.大于一个d.一个或一个以上27、关系的度(degree)是指关系中( )a.属性的个数b.元组的个数c.不同域的个数d.相同域的个数2
8、8、如果使用两台100mb/s的集线器,两者间距一般应( )a.很远b.很近c.不能太远也不能太近d.不一定29、整个数据仓库系统的核心是( )a.数据的存储与管理b.数据源c.olap服务器d.前端工具30、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.serializable31、数据字典dd为dfd图定义了具体的含义,并提供了详细的描述下表显示的是数据字典中( )的内容。 ( )a.数据表条目b.数据项条目c.数据存储条目d.加工条目32、求最短路径的fl
9、oyd算法的时间复杂度为( )( )a.o(n)b.o(n+e)c.o(n2)d.o(n3)33、数据字典的主要任务是管理有关数据的信息,其主要作用有( )a.供数据库管理系统快速查找有关对象的信息b.供数据库管理员查询,以掌握整个系统的运行情况c.支持数据库设计与系统分析d.a、b和c34、临界区是指( )a.进程中访问临界资源的代码b.进程中实现资源共享的代码c.进程中临界资源所处的物理地址d.进程中临界资源所处的虚拟地址35、以下哪个不是网络加密方式( )a.链路加密方式b.端对端加密方式c.网对网加密方式d.节点对节点加密方式36、关于软件著作权产生的时间,表述正确的是( )a.自软件
10、首次公开发表时b.自开发者有开发意图时c.自软件得到国家著作权行政管理部门认可时d.自软件完成创作之日起37、一幅灰度图像,若每个像素有8位像素深度,则最大灰度数目为( )a.128b.256c.512d.102438、下图的最小生成树为(用粗线标注)( )a.b.c.d.39、火车售票点t1、t2分别售出了两张2007年10月20到北京的硬卧票,但数据库里的剩余票数却只减了两张,造成数据的不一致,原因是( )a.系统信息显示出错b.丢失了某售票点修改c.售票点重复读数据d.售票点读了“脏”数据40、c/s(客户机/服务器)与b/s(浏览器/服务器)体系结构的区别是:( )a.b/s建立在局域
11、网上,c/s建立在广域网上b.b/s客户相对固定集中,c/s客户分散c.b/s软件重用性弱于c/sd.b/s较c/s易于维护41、sql语言也称为( )a.结构化定义语言b.结构化控制语言c.结构化查询语言d.结构化操纵语言42、关系数据库是( )的集合,其结构是由关系模式定义的。 ( )a.元组b.列c.字段d.表43、不属于数据库访问接口的是( )a.odbcb.jdbcc.adod.xml44、下面关于查找运算及查找表的叙述,错误的是( )a.哈希表可以动态创建b.二叉排序树属于动态查找表c.二分查找要求查找表采用顺序存储结构或循环链表结构d.顺序查找方法既适用于顺序存储结构,也适用于链
12、表结构45、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46、若程序运行时系统报告除数为0,这属于( )错误。 ( )a.语法b.静态语义c.动态语义d.运算对象不匹配47、确定各基本表的索引,属于数据库设计的( )阶段。 ( )a.需求分析b.概念设计c.逻辑设计d.物理设计48、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-149、事务故障恢复的描述,正确的是( )a.事务故障的恢复必须dba参与b.事务故障的恢复需要数据库复本c.事务故障的恢复只
13、需要日志,不需dba参与d.事务故障的恢复需要日志和数据库复本50、病毒的发展经历了三个阶段,以下( )不属于其发展阶段。 ( )a.dos时代b.minix/linux时代c.windows时代d.internet时代51、以下关于dhcp服务的说法中正确的是( )a.在一个子网内只能设置一台dhcp服务器,以防止冲突b.在默认情况下,客户机采用最先到达的dhcp服务器分配的ip地址c.使用dhcp服务,无法保证某台计算机使用固定ip地址d.客户端在配置时必须指明dhcp服务器ip地址,才能获得dhcp服务52、在需求分析阶段,需求调查的内容是( ),需求分析的结果是( )。在需求分析阶段,
14、需求调查的内容是( )a.信息要求、处理要求b.安全性与完整性要求c.信息要求、安全性要求d.信息要求、处理要求、安全性与完整性要求53、在需求分析阶段,需求调查的内容是( ),需求分析的结果是( )。需求分析的结果是( )a.数据流图b.数据字典c.数据流图、数据字典d.e-r图54、typically, these are concern with the establishment of ( ) the network and with the control of the flow of messages across this channel. the provision of su
15、ch facilities is only part of the network requirements, however, since in many applications the communicating computers may be of different types. this means that they may use different programming languages and, more importantly, different forms of ( ) interface between user(application)program, no
16、rmally referred to, as application processes or aps, and the underlying communication services may be ( ) for example, one computer may be a small single -user computer, while another may be a large ( ) system. in the earlier days of computer communication, these issues meantthat only closed communi
17、ties of computers ( that is, from the same manufacturer) could communicate with each other in a meaningful way. ibms systems network.architecture (sna) and decs digital network architecture (dna) are just two examples of communication software packages produced by manufacturers to allow their system
18、s to be int erconnected together. these proprietary packages, however, of which there am still many inexistence, do not address the problem of universal interconnect ability, or open systems interconnection. in an attempt to alleviate this problem, ( ) , in the late 1970s, formulated a reference mod
19、el to provide a common basis ( or the coordination of standards developments and to allow existing and evolving standards activities to beplaced into perspective with one another.typically, these are concern with the establishment of ( ) the network and with the control of the flow of messages acros
20、s this channel. ( )a.communication channel accessb.protocolsc.data channeld.public communication55、typically, these are concern with the establishment of ( ) the network and with the control of the flow of messages across this channel. the provision of such facilities is only part of the network req
21、uirements, however, since in many applications the communicating computers may be of different types. this means that they may use different programming languages and, more importantly, different forms of ( ) interface between user(application)program, normally referred to, as application processes
22、or aps, and the underlying communication services may be ( ) for example, one computer may be a small single -user computer, while another may be a large ( ) system. in the earlier days of computer communication, these issues meantthat only closed communities of computers ( that is, from the same ma
23、nufacturer) could communicate with each other in a meaningful way. ibms systems network.architecture (sna) and decs digital network architecture (dna) are just two examples of communication software packages produced by manufacturers to allow their systems to be int erconnected together. these propr
24、ietary packages, however, of which there am still many inexistence, do not address the problem of universal interconnect ability, or open systems interconnection. in an attempt to alleviate this problem, ( ) , in the late 1970s, formulated a reference model to provide a common basis ( or the coordin
25、ation of standards developments and to allow existing and evolving standards activities to beplaced into perspective with one another.different forms of ( ) interface between user(application)program ( )a.databaseb.data representationc.protocolsd.data communication56、typically, these are concern wit
26、h the establishment of ( ) the network and with the control of the flow of messages across this channel. the provision of such facilities is only part of the network requirements, however, since in many applications the communicating computers may be of different types. this means that they may use
27、different programming languages and, more importantly, different forms of ( ) interface between user(application)program, normally referred to, as application processes or aps, and the underlying communication services may be ( ) for example, one computer may be a small single -user computer, while
28、another may be a large ( ) system. in the earlier days of computer communication, these issues meantthat only closed communities of computers ( that is, from the same manufacturer) could communicate with each other in a meaningful way. ibms systems network.architecture (sna) and decs digital network
29、 architecture (dna) are just two examples of communication software packages produced by manufacturers to allow their systems to be int erconnected together. these proprietary packages, however, of which there am still many inexistence, do not address the problem of universal interconnect ability, o
30、r open systems interconnection. in an attempt to alleviate this problem, ( ) , in the late 1970s, formulated a reference model to provide a common basis ( or the coordination of standards developments and to allow existing and evolving standards activities to beplaced into perspective with one anoth
31、er.and the underlying communication services may be ( ) for example. ( )a.sameb.similarc.differentd.dependent57、typically, these are concern with the establishment of ( ) the network and with the control of the flow of messages across this channel. the provision of such facilities is only part of th
32、e network requirements, however, since in many applications the communicating computers may be of different types. this means that they may use different programming languages and, more importantly, different forms of ( ) interface between user(application)program, normally referred to, as applicati
33、on processes or aps, and the underlying communication services may be ( ) for example, one computer may be a small single -user computer, while another may be a large ( ) system. in the earlier days of computer communication, these issues meantthat only closed communities of computers ( that is, fro
34、m the same manufacturer) could communicate with each other in a meaningful way. ibms systems network.architecture (sna) and decs digital network architecture (dna) are just two examples of communication software packages produced by manufacturers to allow their systems to be int erconnected together
35、. these proprietary packages, however, of which there am still many inexistence, do not address the problem of universal interconnect ability, or open systems interconnection. in an attempt to alleviate this problem, ( ) , in the late 1970s, formulated a reference model to provide a common basis ( o
36、r the coordination of standards developments and to allow existing and evolving standards activities to beplaced into perspective with one another.while another may be a large ( ) system. in the earlier days of computer communication ( )a.multi-userb.clientc.serverd.full-user58、typically, these are
37、concern with the establishment of ( ) the network and with the control of the flow of messages across this channel. the provision of such facilities is only part of the network requirements, however, since in many applications the communicating computers may be of different types. this means that th
38、ey may use different programming languages and, more importantly, different forms of ( ) interface between user(application)program, normally referred to, as application processes or aps, and the underlying communication services may be ( ) for example, one computer may be a small single -user compu
39、ter, while another may be a large ( ) system. in the earlier days of computer communication, these issues meantthat only closed communities of computers ( that is, from the same manufacturer) could communicate with each other in a meaningful way. ibms systems network.architecture (sna) and decs digi
40、tal network architecture (dna) are just two examples of communication software packages produced by manufacturers to allow their systems to be int erconnected together. these proprietary packages, however, of which there am still many inexistence, do not address the problem of universal interconnect
41、 ability, or open systems interconnection. in an attempt to alleviate this problem, ( ) , in the late 1970s, formulated a reference model to provide a common basis ( or the coordination of standards developments and to allow existing and evolving standards activities to beplaced into perspective wit
42、h one another.or open systems interconnection. in an attempt to alleviate this problem,( )a.dnab.snac.the osid.the iso59、数据的独立性是指(28)是相互独立的;它又可分为(29)。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60、数据的独立性是指(28)是相互独立的;它又可分为(29)。数据的独立性是指( )是相互独立的。 ( )a.数据的存储位置和数据值b
43、.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61、给定关系模式r(u,f),u=a,b,c,d,e,f=ba,da,ae,acb,其候选关键字为(1),则分解=r1(abce),r2(cd)满足(2)。(1)处应选择( )a.abdb.adec.acdd.cd62、给定关系模式r(u,f),u=a,b,c,d,e,f=ba,da,ae,acb,其候选关键字为(1),则分解=r1(abce),r2(cd)满足(2)。(2)处应选择( )a.具有无损连接性、保持函数依赖b.不具有无损连接性、保持函数依赖c.具有无损连接性、不保持函数依赖d.不具有无损连接
44、性、不保持函数依赖63、设有员工实体employee(员工号,姓名,性别,年龄,电话,家庭住址,家庭成员,关系,联系电话)。其中,“家庭住址”包括邮编、省、市、街道信息;“家庭成员,关系,联系电话”分别记录了员工亲属的姓名、与员工的关系以及联系电话,且一个员工允许有多个家庭成员。员工实体employee的主键为( );“家庭住址”是一个( )属性;该关系属于( );为使数据库模式设计更合理,对于员工关系模式employee( )。员工实体employee的主键为( )a.员工号b.员工号,家庭成员c.姓名d.姓名,家庭成员64、设有员工实体employee(员工号,姓名,性别,年龄,电话,家庭
45、住址,家庭成员,关系,联系电话)。其中,“家庭住址”包括邮编、省、市、街道信息;“家庭成员,关系,联系电话”分别记录了员工亲属的姓名、与员工的关系以及联系电话,且一个员工允许有多个家庭成员。员工实体employee的主键为( );“家庭住址”是一个( l员工实体employee的主键为( );“家庭住址”是一个( )属性;该关系属于( );为使数据库模式设计更合理,对于员工关系模式employee( )。该关系属于( )a.2nf,无冗余,无插入异常和删除异常b.2nf,无冗余,但存在插入异常和删除异常c.1nf,存在冗余,但不存在修改操作的不一致d.非1nf,且存在冗余和修改操作的不一致,以
46、及插入异常和删除异常66、设有员工实体employee(员工号,姓名,性别,年龄,电话,家庭住址,家庭成员,关系,联系电话)。其中,“家庭住址”包括邮编、省、市、街道信息;“家庭成员,关系,联系电话”分别记录了员工亲属的姓名、与员工的关系以及联系电话,且一个员工允许有多个家庭成员。员工实体employee的主键为( );“家庭住址”是一个( )属性;该关系属于( );为使数据库模式设计更合理,对于员工关系模式employee( )。为使数据库模式设计更合理,对于员工关系模式employee( )a.只允许记录一个亲属的姓名、与员工的关系以及联系电话b.可以不作任何处理,因为该关系模式达到了3n
47、fc.增加多个家庭成员、关系及联系电话字段d.应该将家庭成员、关系及联系电话加上员工号作为一个独立的模式67、数据库系统必须控制事务的并发执行,保证数据库( )。假设事务t1、t2分别对数据a和b进行的操作如下图所示,事务t1与t2间的并发调度为可串行化调度的是( )。数据库系统必须控制事务的并发执行,保证数据库( )a.处于一致的状态b.不存在冗余的信息c.操作不出现死循环d.备份的完整性68、数据库系统必须控制事务的并发执行,保证数据库( )。假设事务t1、t2分别对数据a和b进行的操作如下图所示,事务t1与t2间的并发调度为可串行化调度的是( )。假设事务t1、t2分别对数据a和b进行的
48、操作如下图所示,事务t1与t2间的并发调度为可串行化调度的是( )a.b.c.d.69、杀毒软件报告发现病毒macro.melissa,由该病毒名称可以推断病毒类型是( l71、结构化查询语言sql是一种( )语言,其主要功能有( ),它的典型句型为select a1,a2,anfrom r1,r2,rmwhere f其中a1,a2,an、r1,r2,rm和f分别是( )。关系模式scs(sno,cno,score)中,sno是学生的学号,cno是课程号,score为成绩。若要查询每门课程的平均成绩,且要求查询结果按平均成绩升序排列。平均成绩相同时,按课程号降序排列,可用sql语言写为( )。若查询结果仅限于平均分数超过85分的,则应( )。结构化查询语言sql是一种( )语言。 ( )a.人工智能
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