一道backup recovery 题目

本文探讨了在用户管理的一致性备份模式下,当丢失了属于 SYSTEM 表空间的数据文件及含有特定时间范围内重做记录的归档日志文件时,如何进行数据库恢复。文章对比了几种不同的恢复方法,并给出了最佳实践。

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160. Your database operates in ARCHIVELOG mode and usermanaged
consistent backups are performed every Sunday night. On Tuesday, at 9:00 a.m. the current log sequence number was 369. Also,on Tuesday you lost the data file belonging to the SYSTEM tablespace and an archivelog file (sequence number 356) that contained redo entries between 8:00 a.m. and 8:30 a.m.With reference to this scenario, what would you do to recover the database?
A.restore all the data files from last Sunday's backup, and then perform a timebased
recovery
B.restore all the data files from last Sunday's backup, and then perform a cancelbased
recovery
C.restore all the data files from last Sunday's backup, and then perform a changebased
recovery
D.restore only data files that belong to the SYSTEM tablespace from last Sunday's backup, and then perform a complete recovery

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