单项选择题
You are working on a database， where you have three redo log groups. When the database is down for a backup， an operating system （OS） user deletes all the redo log files in a group. What will happen when you open your database？（）
A. The instance starts， the database is mounted， but efforts to open the database fail， and an error about the missing redo log group is displayed.
B. Before the instance starts， you receive an error about the missing redo log files of a group.
C. The instance starts and the database opens with an error message written to the alert log file.
D. The instance starts and the database opens because two redo log groups still exist.
E. The instance starts and the database opens， but every attempt to write to redo log files fails with an error.
相关考题
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单项选择题
Youhaveonlytworedologgroupsandthesegroupsgetoverwrittenseveraltimesinaday.Your databaseoperatesinNOARCHIVELOGmodeanduser-managedconsistentbackupsareperformedeverySundaynight.OnThursdaymorning，youfindthatanimportanttablehasbeendroppedandpurged.Withreferencetothisscenario，uptowhatpointintimecanthedataberecovered？（）
A. until Thursday morning
B. until that point in time when the database is opened
C. until that point in time when the recovery is performed
D. until last Sunday’s backup
E. until that point in time when the table is dropped and purged
F. until Wednesday evening -
单项选择题
YouconfiguredthelargepoolforOraclebackupandrestoreoperations.Asaresult，whichcomponentwouldrequirelessmemory？（）
A. streams pool
B. shared pool
C. log buffer
D. keep buffer cache
E. recycle buffer cache -
单项选择题
Youaremanagingadatabaseforwhichincrementalbackupscanbeverytimeconsuming.Inordertoperformoptimizedincrementalbackupsyouenabletheblockchangetrackingfeature.HowwouldyouinstructRMANtousetheblockchangetrackingfeaturewhenperformingincrementalbackups？（）
A. You need to mention it with every BACKUP command.
B. The block change tracking feature is used automatically by RMAN.
C. You need to configure it using the CONFIGURE command.
D. You need to set the necessary initialization parameters to direct RMAN to use the feature.
