单项选择题
You work as a database administrator for Supportcenter.cn. Your database is in NOARCHIVELOG mode. The database has been configured with three redo logs groups， and there have been five log switches. You lost one non-system-critical data file from your database. Which method would you use to recover the data file？（）
A.Restore all the data files and open the database
B.Create the data file and perform tablespace recovery
C.No need to restore any file， just recover the database
D.Restore only the system data file and recover the database
E.Restore only lost date file and performtablespacerecovery
相关考题
-
单项选择题
YourbossatSupportcenter.cnwantsyoutoclarifyOracle10g.Whichconditioninyourdatabaseforcesyoutoperformonlyconsistentbackups？（）
A.The database is in mount state.
B.One of the tablespaces is offline.
C.One of the tablespaces is read only.
D.The database operates in ARCHIEVELOG mode.
E.The database operates in NOARCHIEVELOG mode. -
多项选择题
You work as a database administrator for Supportcenter.cn. Users in the SupportCenter PROD database complain about the slow response when accessing the database. In the Active Session Waiting： Configuration page you find that the majority of the wait time is for the redo log buffer. Further investigation using the Run Queue graph and operating system tools reveals that the redo log files are on the same disks， and that the disk I/O for the redo log files is the reason for the performance degradation. Which two actions would you take to gain performance？（）
A.Increase the size of redo log files
B.Increase the size of redo log buffer
C.Increase the number of redo log files
D.Place the redo log files on a separate disk
E.Decrease the number of redo log groups to two
F.Increate the number Log Writer （LGWR） process -
单项选择题
Initially，fortheAutomaticWorkloadRepository（AWR）statistics，theretentionperiodissetto7days，thecollectionintervalissetto30minutesandthecollectionlevelissettoTypicalinyourproductiondatabase.YouhavebeenusingtheMemoryAdvisorforthelastthreemonthstogeneraterecommendationsfortuningmemorycomponents.However，whenyouobservetheMemoryAdvisoronaFriday，youfindthatthestatisticsareavailableonlyfortwodays，ThursdayandFriday，ofthatweek.Whatwouldhavecausedthestatisticstoberemoved？（）
A.On Wednesday， the statistics have been purged.
B.On Wednesday， the retention period has been set to zero.
C.On Wednesday， the collection interval has been set to zero.
D.On Wednesday， the collection level has been changed to All.
E.On Wednesday， the retention period has been set to one day.
F.On Wednesday， the retention period has been set to two days
G.On Wednesday, the collection level has been changed to Typical.
H.On Wednesday, the collection interval has been set to 1440 minutes.
