Archive file format LOG_ARCHIVE_FORMAT is defined as arch_%s.arc. A week ago, you just archived arch_4.arch to tape, then removed all archived files to save disk space. Yesterday you saw arch_10.arc and arch_11.arc on the disk. Today, you see arch_3.arc in the archive directory. Which two could you happened?() Redo logs were restored from tape for recovery. 。 The file names are only used when they are copied to tape. 。 The database was opened with the RESETLOGS option and log numbers restarted. 。 Log names run in circular fashion; arch_3.arc is re-created by the ARCn process. 。 A file name is randomly chosen by the archive process; as long as it is unique, it does not have to be sequential.。
数据存储和数据流都是(),仅仅所处的状态不同。 分析结果。 事件。 动作。 数据。
下列哪些属于《国务院关于预防煤矿生产安全事故的特别规定》所列举的十五种重大安全生产隐患和行为?() 通风系统不完善、不可靠。 有严重水患,未采取有效措施的。 超层超界开采的。 有冲击地压危险,未采取有效措施的。
给下列汉字注音并组词。剋
在管理者角色中,明茨伯格把人际关系方面的角色概括为() 挂名首脑。 领导者。 联络者。 监听者。 谈判者。
根据客户生命周期,在开发期阶段,关于客户服务下列说法正确的是:()