单项选择题
Examine the following RMAN script：
RMAN> run { debug on；
allocate channel c1 type disk； backup datafile 5； }
Which statement describes the purpose of the script？（）
A. The data file is checked for physical corruption and backed up if found clean.
B. The backup of data file 5 is performed and the interactive messages during the backup are suppressed.
C. The existing backup for the data file is checked and the backup is performed if there are changes in the data file after the last backup.
D. The backup of data file 5 is performed and all SQL statements that are executed during RMAN compilation and their results are displayed
相关考题
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单项选择题
WhatdoestheDB_FLASHBACK_RETENTION_TARGETparameterconfigure？（）
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 -
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
