软件水平习题练习

软件水平考试系统分析师易错题(2015-12-4)
1题:自底向上的估计法的特点是( )
A.简单、工作量小、误差大
B.精度高,但缺少子任务(模块)间的联系
C.估算较精确,但区分类比较困难
D.复杂、不可行,一般不采用此种方法,但这种副作用可以通过详细的设计文档加以控制
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2、3、4、5、6题:In the following essay, each bland has four choices. Choose the best answer and write down on the answer sheet. With the implementation of (6) the so – called network has become a reality. The provision of such facilities is the most important part of the network requirements. However, 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 (7) interface between user(application)program, normally referred to ,as application processes, and the underlying communication services may be (8). For example, one computer may be a small single-user computer, while another may be a large (9) system. In the earlier days of computer communication, these issues meant that only closed communities of computers (that is, from the same manufacturer) could communicate with each other in a meaningful way. IBM’s systems Network Architecture (SNA) and DEC’s Digital Network Architecture (DNA) are just two examples of communication software packages produced by manufacturers to allow their systems to be intercormected 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,(10) ,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 be placed into perspective with one another.
(6)
A.communicationchannel
B.protocols
C.datachannel
D.publiccommunication
(7)
A.database
B.datarepresentation
C.protocols
D.datacommunication
(8)
A.same
B.similar
C.different
D.dependent
(9)
A.multi-user
B.client
C.server
D.full-user
(10)
A.DNA
B.SNA
C.theOSI
D.theISO
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7题:栈结构不适用地下列( )应用
A.表达式求值
B.树的层次序周游算法的实现
C.二叉树对称序周游算法的实现
D.快速排序算法的实现
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8、9、10、11、12题:在形式语言中,方法G是一个四元组G=(VN,Vr,P,Z),其中VN为(6)。若方法G的产生式集P为:  (1)Z→Bc (2)Z→Zc (3)B→Ab (4)B→Bb (5)A→Aa (6)A→a  则文法G是(7)文法,识别G的自动机为(8)。对于G来说,(9)为文法G可接受的字符串,(10)为文法G不可接受的字符串。
(6)
A.状态标志符
B.开始符
C.语句集
D.非终结符集合
(7)
A.短语
B.上下文有关
C.上下文无关
D.正则
(8)
A.图灵机
B.下推自动机
C.有穷状态自动机
D.线性界限自动机
(9)
A.aaabc
B.acbb
C.acbcab
D.acbbca
(10)
A.abbcc
B.acbc
C.aaabc
D.aabbccc
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13题:在谓词演算中,P(a)是xp(x)的有效结论,根据是( )。
A.US规则
B.UG规则
C.ES规则
D.EG规则
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14题:入侵检测系统按其输入数据的来源分为3种,其中不包括( )
A.基于主机的入侵检测系统
B.基于网络的入侵检测系统
C.分布式入侵检测系统
D.集中式入侵检测系统
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15题:影响软件开发成本估算的因素不包括以上哪项( )
A.软件人员业务水平
B.软件开始规模及复杂度
C.开发所需时间
D.开发所需硬件资源模型
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16题:某软件公司开发的《财务之星》管理软件,在我国受法律保护的依据是( )
A.《中华人民共和国专利法》
B.《中华人民共和国科学技术进步法》
C.《中华人民共和国商标法》
D.《中华人民共和国著作权法》
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17题:下列对关系的叙述中( )不正确的
A.关系中的每个属性是不可分解的
B.在关系中元组的顺序是无关紧要的
C.任意的一个二维表都是一个关系
D.在关系中任意两个元组不能完全相同
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18题:设集合A={a,b,c},A上的二元关系R={,}不具备关系( )性质。
(14)
A.传递性
B.反对称性
C.对称性
D.自反性
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