單項選擇題

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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多項選擇題

Which two statements are true about the Automatic Diagnostic Repository （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

多項選擇題

You want to take a complete database backup using RMAN. The backup should consist onlythe used blocks from your database. Which two statements are true about this backup operation？（）

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

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What does the DB_FLASHBACK_RETENTION_TARGET parameter configure？（）

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Which two statements are true about the Automatic Diagnostic Repository （ADR）？（）

You want to take a complete database backup using RMAN. The backup should consist onlythe used blocks from your database. Which two statements are true about this backup operation？（）

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What does the DB_FLASHBACK_RETENTION_TARGET parameter configure？（）

Which two statements are true about the Automatic Diagnostic Repository （ADR）？（）

You want to take a complete database backup using RMAN. The backup should consist onlythe used blocks from your database. Which two statements are true about this backup operation？（）