| 软件水平考试系统分析师易错题（2017/10/11） |
| 第1、2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3、4、5、6、7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8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9题：根据质量管理的基本原理，所进行的PDCA循环，其中“D”是指( )
A、计划 B、实施 C、检查 D、处理 |
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| 第10题：数据字典是数据流图中所有元素的定义的集合，一般由以下四类条目组成( )
A、数据说明条目、控制流条目、加工条目、数据存储条目 B、数据流条目、数据项条目、文件条目、加工条目 C、数据项条目、数据流条目、基本加工条目、数据存储条目 D、数据流条目、数据文件条目、数据池条目、加工条目 |
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