| 软件水平考试系统分析师易错题（2019/5/13） |
| 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：若要求查找姓名中第一个字为‘刘’的学生号和姓名。下面列出的SQL语句中，( )是正确的。
A、SELECT S#，SNAME，FROM S WHERE、SNAME=‘刘%’ B、SELECT S#，SNAME，FROM S WHERE、SNAME=‘刘-’ C、SELECT S#，SNAME，FROM S WHERE、SNAME、LIKE‘刘%’ D、SELECT S#，SNAME，FROM S WHERE、SNAME、LIKE、‘刘-’ |
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| 第7题：虚拟存储器的最大容量( )
A、为主辅存容量之和 B、由计算机的地址结构决定 C、是任意的 D、由作业的地址空间决定 |
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| 第8、9题：因计算机硬件和软件环境的变化而作出的修改软件的过程称为(7)，为增加软件功能、增强软件性能、提高软件运行效率而进行的维护活动称为(8)
(7)，(8) A、校正性维护 B、适应性维护 C、完善性维护 D、预防性维护 |
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| 第10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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