综合知识
1/36
以下关于文档的叙述中,不正确的是(33)。
综合知识
2/36
由于信用卡公司升级了其信用卡支付系统,导致超市的原有信息系统也需要做相应的修改工作,该类维护属于(34)。
综合知识
3/36
用白盒测试方法对下图所示的程序进行测试,设计了4个测试用例:①(x = 0, y=3)、②(x=l,y = 2)、③(x = -l,y = 2)和④(x = 3,y=l)。测试用例①②实现了(35) 覆盖:若要完成路径覆盖,则可用测试用例(36)。
综合知识
4/36
对于场景:一个公司负责多个项目,每个项目(Project)由一个员工(Employee) 团队(Team)来开发。下列UML概念图中,(41)最适合描述这一场景。
综合知识
5/36
UML中接口可用于(42)。
综合知识
6/36
下列活动图中可以同时执行的活动是(43)。
综合知识
7/36
每种设计模式都有特定的意图。(44)模式使得一个对象在其内部状态改变时通过调用另一个类中的方法改变其行为,使这个对象看起来如同修改了它的类。下图是采用该模式的有关TCP连接的结构图实例。该模式的核心思想是引入抽象类(45)来表 示TCP连接的状态,声明不同操作状态的公共接口,其子类实现与特定状态相关的行为。当一个(46)对象收到其他对象的请求时,它根据自身的当前状态做出不同的反应。
综合知识
8/36
每种设计模式都有特定的意图。(44)模式使得一个对象在其内部状态改变时通过调用另一个类中的方法改变其行为,使这个对象看起来如同修改了它的类。下图是采用该模式的有关TCP连接的结构图实例。该模式的核心思想是引入抽象类(45)来表 示TCP连接的状态,声明不同操作状态的公共接口,其子类实现与特定状态相关的行为。当一个(46)对象收到其他对象的请求时,它根据自身的当前状态做出不同的反应。
综合知识
9/36
将高级语言源程序翻译成目标程序的是(48)
综合知识
10/36
在对程序语言进行翻译的过程中,常采用一些与之等价的中间代码表示形式。常用的中间代码表示不包括(49) 。
综合知识
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以下关于程序错误的叙述中,正确的是(50)。
综合知识
12/36
关系R1和R2如下图所示:


若进行RlR2运算,则结果集为(51)元关系,共有(52)个元组。
综合知识
13/36
关系R1和R2如下图所示:


若进行RlR2运算,则结果集为(51)元关系,共有(52)个元组。
综合知识
14/36
设有关系模式R (E,N,M, L, Q),其函数依赖集为F={ E—>N, EM—>Q,M—>L}。则关系模式R达到了(53);该关系模式(54)。
综合知识
15/36
设有关系模式R (E,N,M, L, Q),其函数依赖集为F={ E—>N, EM—>Q,M—>L}。则关系模式R达到了(53);该关系模式(54)。
综合知识
16/36
已知关系模式:图书(图书编号,图书类型,图书名称,作者,出版社,出版日期,ISBN),图书编号唯一识别一本图书。建立《计算机》类图书的视图Computer-BOOK, 并要求进行修改、插入操作时保证该视图只有计算机类的图书。实现上述要求的SQL语句如下:
综合知识
17/36
已知关系模式:图书(图书编号,图书类型,图书名称,作者,出版社,出版日期,ISBN),图书编号唯一识别一本图书。建立《计算机》类图书的视图Computer-BOOK, 并要求进行修改、插入操作时保证该视图只有计算机类的图书。实现上述要求的SQL语句如下:
综合知识
18/36
在字符串的模式匹配过程中,如果模式串的每个字符依次和主串中一个连续的字符序列相等,则称为匹配成功。如果不能在主串中找到与模式串相同的子串,则称为匹配失败。在布鲁特一福斯模式匹配算法(朴素的或基本的模式匹配)中,若主串和模式串的长度分别为n和m (且n远大于m),且恰好在主串末尾的m个字符处匹配成功,则在上述的模式匹配过程中,字符的比较次数最多为(57)。
综合知识
19/36
若某二叉树的后序遍历序列为KBFDCAE,中序遍历序列为BKEFACD,则该二叉树为(58)。
综合知识
20/36
在13个元素构成的有序M[1…13]中进行折半查找(向下取整),若找到的元素为M[4],则被比较的元素依次为(59)
综合知识
21/36
拓扑排序是将有向图中所有顶点排成一个线性序列的过程,并且该序列满足:若在AOV网中从顶点vi到vj有一条路径,则顶点vi必然在顶点vj之前。对于下面所示的有向图,(60)是其拓扑序列。
综合知识
22/36
下图所示为一棵M阶B-树,M最有可能的值为(61).
综合知识
23/36
将数组{1,1,2,4,7,5}从小到大排序,若采用(62)排序算法,则元素之间需要进行的比较次数最少,共需要进行(63)次元素之间的比较。
综合知识
24/36
将数组{1,1,2,4,7,5}从小到大排序,若采用(62)排序算法,则元素之间需要进行的比较次数最少,共需要进行(63)次元素之间的比较。
综合知识
25/36
霍夫曼编码将频繁出现的字符釆用短编码,出现频率较低的字符采用长编码。具体的操作过程为:i)以每个字符的出现频率作为关键字构建最小优先级队列;ii)取出关键 字最小的两个结点生成子树,根节点的关键字为孩子节点关键字之和,并将根节点插入到最小优先级队列中,直至得到一颗最优编码树。
霍夫曼编码方案是基于(64)策略的。用该方案对包含a到f六个字符的文件进行编码,文件包含100,000个字符,每个字符的出现频率(用百分比表示)如下表所示,则与固定长度编码相比,该编码方案节省了(65)存储空间。
综合知识
26/36
霍夫曼编码将频繁出现的字符釆用短编码,出现频率较低的字符采用长编码。具体的操作过程为:i)以每个字符的出现频率作为关键字构建最小优先级队列;ii)取出关键 字最小的两个结点生成子树,根节点的关键字为孩子节点关键字之和,并将根节点插入到最小优先级队列中,直至得到一颗最优编码树。
霍夫曼编码方案是基于(64)策略的。用该方案对包含a到f六个字符的文件进行编码,文件包含100,000个字符,每个字符的出现频率(用百分比表示)如下表所示,则与固定长度编码相比,该编码方案节省了(65)存储空间。
综合知识
27/36
在Windows 2003 Server中启用配置SNMP服务时,必须以(66)身份登录才能完成SNMP服务的配置功能。
综合知识
28/36
在ASP的内置对象中, (67)对象可以修改cookie中的值。
综合知识
29/36
分配给某公司网络的地址块是220.17.192.0/20,该网络被划分为(68)个C类子网,不属于该公司网络的子网地址是(69)。
综合知识
30/36
分配给某公司网络的地址块是220.17.192.0/20,该网络被划分为(68)个C类子网,不属于该公司网络的子网地址是(69)。
综合知识
31/36
如果DNS服务器更新了某域名的IP地址,造成客户端域名解析故障,在客户端可以用两种方法解决此问题,其中一种是在Windows命令行下执行(70)命令。
综合知识
32/36
Computers will become more advanced and they will also become easier to use. Improved speed recognition will make the operation of a computer easier. Virtual reality (虚拟现实),the technology of (71) with a computer using all of the human senses, will also contribute to better human and computer (72) . Other, exotic (奇异的)models of computation are being developed, including biological computing that uses living organisms, molecular computing that uses molecules with particular (73) , and computing that uses DNA, the basic unit of heredity (遗传),to store data and carry out operations. These are examples of possible future computational platforms that, so far,are limited in abilities or are strictly ( 74 ) . Scientists investigate them because of the physical limitations of miniaturizing circuits embedded in silicon. There are also (75) related to heat generated by even the tiniest of transistors.
综合知识
33/36
Computers will become more advanced and they will also become easier to use. Improved speed recognition will make the operation of a computer easier. Virtual reality (虚拟现实),the technology of (71) with a computer using all of the human senses, will also contribute to better human and computer (72) . Other, exotic (奇异的)models of computation are being developed, including biological computing that uses living organisms, molecular computing that uses molecules with particular (73) , and computing that uses DNA, the basic unit of heredity (遗传),to store data and carry out operations. These are examples of possible future computational platforms that, so far,are limited in abilities or are strictly ( 74 ) . Scientists investigate them because of the physical limitations of miniaturizing circuits embedded in silicon. There are also (75) related to heat generated by even the tiniest of transistors.
综合知识
34/36
Computers will become more advanced and they will also become easier to use. Improved speed recognition will make the operation of a computer easier. Virtual reality (虚拟现实),the technology of (71) with a computer using all of the human senses, will also contribute to better human and computer (72) . Other, exotic (奇异的)models of computation are being developed, including biological computing that uses living organisms, molecular computing that uses molecules with particular (73) , and computing that uses DNA, the basic unit of heredity (遗传),to store data and carry out operations. These are examples of possible future computational platforms that, so far,are limited in abilities or are strictly ( 74 ) . Scientists investigate them because of the physical limitations of miniaturizing circuits embedded in silicon. There are also (75) related to heat generated by even the tiniest of transistors.
综合知识
35/36
Computers will become more advanced and they will also become easier to use. Improved speed recognition will make the operation of a computer easier. Virtual reality (虚拟现实),the technology of (71) with a computer using all of the human senses, will also contribute to better human and computer (72) . Other, exotic (奇异的)models of computation are being developed, including biological computing that uses living organisms, molecular computing that uses molecules with particular (73) , and computing that uses DNA, the basic unit of heredity (遗传),to store data and carry out operations. These are examples of possible future computational platforms that, so far,are limited in abilities or are strictly ( 74 ) . Scientists investigate them because of the physical limitations of miniaturizing circuits embedded in silicon. There are also (75) related to heat generated by even the tiniest of transistors.
综合知识
36/36
Computers will become more advanced and they will also become easier to use. Improved speed recognition will make the operation of a computer easier. Virtual reality (虚拟现实),the technology of (71) with a computer using all of the human senses, will also contribute to better human and computer (72) . Other, exotic (奇异的)models of computation are being developed, including biological computing that uses living organisms, molecular computing that uses molecules with particular (73) , and computing that uses DNA, the basic unit of heredity (遗传),to store data and carry out operations. These are examples of possible future computational platforms that, so far,are limited in abilities or are strictly ( 74 ) . Scientists investigate them because of the physical limitations of miniaturizing circuits embedded in silicon. There are also (75) related to heat generated by even the tiniest of transistors.