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  3. 2022年05月数据库系统工程师考试上午真题【基础知识】
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2022年05月数据库系统工程师考试上午真题【基础知识】

【66】由于机房断电,某个使用检查点记录的数据库出现故障,该故障属于(66)

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【67】大数据的特性一般包括(67)
①数量大②速度增长快③多样性④价值密度低

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【68】数据仓库是为了构建新的分析处理环境而出现的一种数据存储和组织技术,其特征不包括(68)

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【69】相比于集中式数据库,分布式数据库具有(69)的优点。

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【70】以下关于MapReduce技术的说法中,不正确的是(70)

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【71-75】Corporate decision makers require access to information from multiple such sources.Setting up queries on individual sources is both cumbersome and (71).Moreover,the sources of data may store only current data,whereas decision makers may need access to (72) data as well.A data warehouse is a repository (or archive)of information gathered from multiple sources,stored under a unified schema,at a (73)site.Once gathered,the data are stored for a long time,permitting access to historical data.Thus,data warehouses provide the user with a single consolidated(74)to data,making decision-support queries easier to write.Moreover,by accessing information for decision support from a data warehouse,the decision maker ensures that online transaction-processing systems are not(75)by the decision-supportworkdoa.

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