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软件设计师每日一练试题内容（2021/10/31）

试题1：

设集合Z26{0,1,…,25｝， 乘法密码的加密函数为Ek:Z26→Z26，Zki=(ki)mod 26，密钥k∈Z26-{0)，则加密函数K7(i）=(7i)mod 26是一个（ ）函数。
A、单射但非满射 
B、满射但非单射 
C、非单射且非满射 
D、双射 

试题解析与讨论：www.cnitpm.com/st/76592637.html
试题参考答案：D

试题2：

Networks can be interconnected by different devices in the physical layer networks can be connected by （1）or hubs .which just move the bits from one network to an identical network. One layer up we find bridges and switches which operate at data link layer. They can accept （2）examine the MAC address and forward the frames to a different network while doing minor protocol translation in the process in me network layer ,we have routers that can connect two networks, If two networks have （3） network layer, the router may be able to translate between the packer formats. In the transport layer we find transport gateway, which can interface between two transport connections Finally, in the application layer, application gateways translate message （4） .As an example, gateways between Internet e-mail and X.400 e-mail must （5） the e-mail message and change various header fields.
（1）A、reapers  
B、relays 
C、packages 
D、modems
（2）A、frimes 
B、packets 
C、packages 
D、cells
（3）A、special 
B、dependent 
C、similar 
D、dissimilar
（4）A、syntax 
B、semantics 
C、language 
D、format
（5）A、analyze 
B、parse 
C、delete 
D、create 

试题解析与讨论：www.cnitpm.com/st/77142656.html
试题参考答案：A、A、D、B、B

试题3：

处理机主要由处理器、存储器和总线组成，总线包括 （ ） 。
A、数据总线、地址总线、控制总线
B、并行总线、串行总线、逻辑总线
C、单工总线、双工总线、外部总线
D、逻辑总线、物理总线、内部总线

试题解析与讨论：www.cnitpm.com/st/81522807.html
试题参考答案：A

试题4： 结构化分析的输出不包括（ ）。
A.数据流图
B.数据字典
C.加工逻辑
D.结构图
试题解析与讨论：www.cnitpm.com/st/4070529973.html
试题参考答案：D

试题5：

当用户通过键盘或鼠标进入某应用系统时，通常最先获得键盘或鼠标输入信息的是（ ）程序。
A．命令解释
B．中断处理
C．用户登录
D．系统调用

试题解析与讨论：www.cnitpm.com/st/2532720857.html
试题参考答案：B

试题6：

某企业由于外部市场环境和管理需求的变化对现有软件系统提出新的需求，则对该软件系统进行的维护属于（）维护。
A．正确性
B．完善性
C．适应性
D．预防性

试题解析与讨论：www.cnitpm.com/st/2475828343.html
试题参考答案：C

试题7： The project workbook is not so much a separate document as it is a structure imposed on the documents that the project will be producing anyway.
All the documents of the project need to be part of this （　）. This includes objectives ,external specifications , interface specifications , technical standards , internal specifications and administrative memoranda(备忘录).
Technical prose is almost immortal. If one examines the genealogy ( Ff ) of a customer manual for a piece of hardware or software , one can trace not only the ideas , but also many of the very sentences and paragraphs back to the first （请作答此空） proposing the product or explaining the first design. For the technical writer, the paste-pot is as mighty as the pen.
Since this is so, and since tomorrow's product-quality manuals will grow from today’s memos, it is very important to get the structure of the documentation right. The early design of the project （ ） ensures that the documentation structure itself is crafted, not haphazard. Moreover, the establishment of a structure molds later writing into segments that fit into that structure.
The second reason for the project workbook is control of the distribution of （ ）. The problem is not to restrict information, but to ensure that relevant information gets to all the people who need it.
The first step is to number all memoranda, so that ordered lists of titles are available and h worker can see if he has what he wants. The organization of the workbook goes well beyond this to establish a tree-structure of memoranda. The （ ） allows distribution lists to be maintained by subtree, if that is desirable.
A.objective
B.memoranda
C.standard
D.specification
试题解析与讨论：www.cnitpm.com/st/407629685.html
试题参考答案：B

试题8：

采用面向对象方法开发软件的过程中，抽取和整理用户需求并建立问题域精确模型的过程叫  （ ）  。
A、面向对象测试
B、面向对象实现
C、面向对象设计
D、面向对象分析

试题解析与讨论：www.cnitpm.com/st/82752849.html
试题参考答案：D

试题9：

可用于数字签名的算法是（） 。
A．RSA
B．IDEA
C．RC4
D．MD5

试题解析与讨论：www.cnitpm.com/st/2861212886.html
试题参考答案：A

试题10：

以下4种路由中，  ( )  路由的子网掩码是255.255.255.255 。
A．远程网络
B．静态
C．默认
D．主机

试题解析与讨论：www.cnitpm.com/st/2529817380.html
试题参考答案：D