| 软件水平考试系统分析师易错题（2019/10/11） |
| 第1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2、3、4、5、6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7、8题：命题公式￢(P∨Q)←→(P∧Q)的合取范式为(4)，析取范式为(5)。
(4) A、(P∨Q)∧(￢P∨￢Q) B、(P∨￢Q)∧(￢P∨￢Q) C、(￢P∨Q)∧(P∨￢Q) D、(P∨Q)∧(￢P∨Q) (5) A、(P∧Q)∨(￢P∧Q) B、(￢P∧￢Q)∨(￢P∧Q) C、(P∧￢Q)∨(￢P∧Q) D、(P∧￢Q)∨(P∧Q) |
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| 第9题：在电子商务环境中，对中介所发生的变化，你认为错误的是( )
A、传统中介的数目将减少 B、传统中介的数目将由于电子商务带来得便利手段而增加 C、要产生一些新的中介形式 D、电子商务中如果又增加新的中介，其效率可能还是会提高 |
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| 第10题：进行系统修改时可能会产生维护的副作用，没有( )
A、修改数据的副作用 B、修改错误后，又引入了新的错误 C、修改代码的副作用 D、文档资料的副作用 |
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