Oracle数据库提供认证、访问控制、特权管理、透明加密等多种安全机制和技术。以下关于Oracle数据库表述，错误的是（ ）。
参见《信息安全工程师5天修炼》的Oracle数据库系统安全部分。Oracle数据库除了Oracle数据库认证外，还集成支持操作系统认证、网络认证、多级认证、SSL认证等方式。Oracle数据库的认证方式采用“用户名+口令”，具有口令加密、账户锁定、口令生命期和过期、口令复杂度验证等安全功能。对于数据库管理员认证，Oracle数据库要求进行特别认证，支持强认证、操作系统认证、口令文件认证。网络认证支持第三方认证、PKI认证、远程认证等。Oracle数据库提供细粒度访问控制，如针对select, insert, update, delete等操作，可以使用不同的策略。
Corporate decision makers require access to information from multiple such sources. Seting 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 ）dataas 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-supportworkdoad.
Corporate decision makers require access to information from multiple such sources. Seting 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 ）dataas 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-supportworkdoad.
Corporate decision makers require access to information from multiple such sources. Seting 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 ）dataas 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-supportworkdoad.
Corporate decision makers require access to information from multiple such sources. Seting 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 ）dataas 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-supportworkdoad.
Corporate decision makers require access to information from multiple such sources. Seting 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 ）dataas 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-supportworkdoad.
以下关于MapReduce技术的说法中，不正确的是（ ）。
相比于集中式数据库，分布式数据库具有（ ）的优点。
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（ ）。
大数据的特性一般包括（ ）。
①数量大；②速度增长快；③多样性；④价值密度低。
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（ ）。
