2015年05月数据库系统工程师考试上午真题【基础知识】-软考吧-您身边的软考专家-www.ruankaoba.com

2015年05月数据库系统工程师考试上午真题【基础知识】

内容：基础知识
时间：150分钟
总分：75分
题数：75题

【60-61】下图所示的E-R图中，应作为派生属性的是（60）。该E-R图应转换的关系模式为（61），其中各关系模式均满足4NF。

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【62】以下关于面向对象数据库的叙述中，不正确的是（62）。

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【63】MongoDB是一种NoSQL数据库，具体地说，是（63）存储数据库。

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【64】根据历史数据，确定一个就诊人员是否可能患心脏病，可以采用（64）算法。

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【65】关于聚类算法K-Means和DBSCAN的叙述中，不正确的是（65）。

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【66】在下图所示的网络配置中，发现工作站B无法与服务器A通信。（66），故障影响了两者互通。

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【67】以下关予VLAN的叙述中，属于其优点的是（67）。

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【68】以下关于URL的叙述中，不正确的是（68）。

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【69-70】DHCP协议的功能是（69）；FTP使用的传输层协议为（70）。

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【71-75】Why Have Formal Documents?
First, writing g the decisions down is essential.Only when one writes do the gaps appear and the （71）protrude（突出）.The act of writing tums out to require hundreds of mini-decisions, and it is the existence of these that distinguishes clear, exact policies from
fuzzy ones.
Second, the documents will communicate the decisions to others.The manager will be continually amazed that policies he took for common knowledge are totally unknown by some member of his team.Since his fundamental job is to keep everybody going in the （72） direction, his chief daily task will b e communication, not decision-making, and his documents will be immensely （73） this load.
Finally, a manager's documents give him a data base and checklist.By reviewing them （74） he sees where he is, and he sees what changes of emphasis or shifts in direction are needed.
The task of the manager is to develop a plan and then to realize it.But only the written plan is precise and communicable.Such a plan consists of documents on what, when, how much,where, and who.This small set of critical documents （75）much of the manager's work.If their comprehensive and critical nature is recognized in the beginning, the manager can approach them as friendly tools rather than annoying busywork.He will set his direction much more crisply and quickly by doing so.

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