单项选择题

A. An upper limit on how far you can flash back the dat……

What does the DB_FLASHBACK_RETENTION_TARGET parameter configure？（）

A. An upper limit on how far you can flash back the database，depending on the information in the redo logs
B. An upper limit on how far you can flash back the database，depending on the information in the undo tablespace
C. The amount of time for which the flashback data is to be kept in the flash recovery area， provided that there is enough space
D. The amount of time for which the flashback data is guaranteed to be kept in the undo tablespace，provided that there is enough space

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热门试题

多项选择题WhichtwostatementsaretrueabouttheAutomaticDiagnosticRepository（ADR）？（）

A. The ADR base keeps all diagnostic information in binary format
B. SQL*Plus provides the ADRI script， which can be used to work with ADR
C. The ADR can be used for problem diagnosis only when the database is open
D. The ADR can be disabled by settting the DIAGNOSTIC_DEST parameter to null
E. The ADR can be used for problem diagnosis even when the database instance is down
F. The ADR base is shared across multiple instances

多项选择题YouwanttotakeacompletedatabasebackupusingRMAN.Thebackupshouldconsistonlytheusedblocksfromyourdatabase.Whichtwostatementsaretrueaboutthisbackupoperation？（）

A. Backup compression should be enabled
B. Parallelism for the channel should be set to 2
C. All the files must be backed up as backup sets
D. The backup may be stored either on disk or on media with media manager

多项选择题Whichoptionswouldyouconsiderwhileconfiguringaflashrecoveryareafastrecoveryareain11gRelease2foryourproductiondatabasethatisrunninginARCHIVELOGmode？（）

A. Setting the FAST_START_MTTR_TARGET to set the mean time to recover
B. Setting the RECOVERY_PARALLELISM parameter to twice the number of CPUs
C. Using the DB_RECOVERY_FILE_DEST parameter to set the location for flash recovery area
D. Using the DB_RECOVERY_FILE_DEST_SIZE parameter to define the disk space limit for the recovery files created in the flash recovery area

多项选择题Toenablefasterincrementalbackups，youenabledblockchangetrackingforthedatabase.Whichtwostatementsaretrueabouttheblockchangetrackingfile？（）

A. Multiple change tracking files can be created for a database.
B. The change tracking file must be created after the first level 0 backup.
C. RMAN does not support backup and recovery of the change tracking file.
D. The database clears the change tracking file and starts tracking changes again，after whole database restore and recovery operations.

单项选择题View the Exhibit and examine the output. You execute the following RMAN command to perform the backup operation： RMAN> RUN { ALLOCATE CHANNEL c1 DEVICE TYPE disk MAXOPENFILES 8； BACKUP DATABASE FILESPERSET 4； } What is the multiplexing level in the preceding backup process？（）

A. 4
B. 8
C. 7
D. 0