| 软件水平考试系统分析师易错题（2018/7/19） |
| 第1题：下面选项中正确描述了冲突域的是( )
A、传送了冲突的数据包的网络区域 B、以网桥、路由器、交换机为边界的网络区域 C、安装了路由器和集线器的网络区域 D、应用了过滤器的网络区域 |
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| 第2、3、4、5、6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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| 第7、8、9、10、11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 NetworkArchitecture (SNA、andDEC’sDigital NetworkArchitectureDNA、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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| 第12题：下面关于测试的结论中只有一个是正确的，它是( )
A、测试工作要贯穿于整个软件开发的全过程 B、测试工作是指在编程实现过程中进行的排错工作 C、测试工作是指在产品完成后用户的验收工作过程 D、测试工作量的弹性比较大，可以根据时间进度进行裁减 |
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| 第13题：电视系统采用的颜色空间是，其亮度信号和色度信号是相分离的。下列颜色空间中，( )颜色空间不属于电视系统的颜色空间。
A、YUV B、YIQ C、YCrCb D、HSL |
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