2012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

2012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

【63】（63）不是数据仓库的特点。

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【64】以下关于面向对象数据模型的叙述中，错误的是（64）。

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【65】以下关于面向对象数据库系统的叙述中，错误的是（65）。

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【66】网络中存在各种交换设备，下面的说法中错误的是（66）。

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【67】SMTP传输的邮件报文采用（67）格式表示。

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【68】网络的可用性是指（68）。

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【69】建筑物综合布线系统中的园区子系统是指（69）。

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【70】如果子网172.6.32.0/20被划分为子网172.6.32.0/26，则下面的结论中正确的是（70）。

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【71-75】At a basic level, cloud computing is simply a means of delivering IT resources as （71）. Almost all IT resources can be delivered as a cloud service: applications, compute power, storage capacity, networking, programming tools, even communication services and collaboration （72）.
Cloud computing began as large-scale Internet service providers such as Google, Amazon, and others built out their infrastructure. An architecture emerged: massively scaled,（73） distributed system resources, abstracted as virtual IT services and managed as continuously configured, pooled resources. In this architecture, the data is mostly resident on （74） “somewhere on the Internet” and the application runs on both the “cloud servers” and the user’s browser.
Both clouds and grids are built to scale horizontally very efficiently. Both are built to withstand failures of （75） elements or nodes. Both are charged on a per-use basis. But while grids typically process batch jobs, with a defined start and end point, cloud services can be continuous. What’s more, clouds expand the types of resources available — file storage, databases, and Web services — and extend the applicability to Web and enterprise applications.

真题详情及解析