The best way to validate that a database backup is working, is to:验证数据库备份是否正常工作的最佳方法是::()?
（A）Periodically recover from the backup file定期从备份文件恢复
（B）Check the size of the backup file检查备份文件的大小
（C）Appoint a special DBA in charge of backups指定专门的DBA负责备份
（D）Check the backup logs every day每天检查备份日志
（E）Check for the automatic email notification of backup success检查备份成功的自动电子邮件通知 答案解析:
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- 2具有多个ETL、存储和查询工具的数据仓库部署经常由于缺乏以下问题而受到影响:(单选题)
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