| 软件水平考试系统分析师易错题（2018/6/20） |
| 第1、2、3、4、5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6题：目前已经提出的软件开发标准化的方案有( )
A、CORBA B、XML C、HTML D、PVCS |
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| 第7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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| 第8、9题：一个局域网中某台主机的IP地址为176.68.160.12,使用20位作为网络地址,那么该局域网的子网掩码为(11)最多可以连接的主机数为(12)
(11) A、255.255.246.0 B、255.255.244.0 C、255.255.240.0 D、255.242.0.0 (12) A、1022 B、2046 C、4094 D、4096 |
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| 第10题：下列关于瀑布模型的描述正确的是( )
A、瀑布模型的核心是按照软件开发的时间顺序将问题简化 B、瀑布模型具有良好的灵活性 C、瀑布模型采用结构化的分析与设计方法，将逻辑实现与物理实现分开 D、利用瀑布模型，如果发现问题修改的代价很低 |
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