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Which two statements are true about Block Media Recovery （BM

题目
多选题
Which two statements are true about Block Media Recovery （BMR）？（）
A

BMR increases the Mean Time To Recover （MTTR）.

B

BMR can only be implemented using Recovery Manager （RMAN）.

C

The blocks that need to be recovered are accessible during BMR.

D

BMR cannot be performed using cumulative incremental backups.

E

The datafile must be restored if most of the blocks in the datafile are corrupt.

参考答案和解析
正确答案： D,E
解析： 暂无解析
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相似问题和答案

第1题：

To enable faster incremental backups, you enabled block change tracking for the database.Which two statements are true about the block change tracking file? ()(Choose two.)

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.


参考答案：C, D

第2题：

Which two statements are true about the RMAN validate database command?()

A. It checks the database for intrablock corruptions.

B. It can detect corrupt pfiles.

C. It can detect corrupt spfiles.

D. It checks the database for interblock corruptions.

E. It can detect corrupt block change tracking files.


参考答案：A, C

第3题：

You want to take a complete database backup using RMAN. The backup should consist only the 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


参考答案：D, E

第4题：

You are in the middle of a transaction and very crucial data has been modified. Because of a hardware failure， the instance has shut down before synchronizing all the database files. Which two statements are true？（）

  • A、On startup， SMON coordinates instance recovery.
  • B、On startup， CKPT coordinates instance recovery.
  • C、On startup， use RMAN to perform instance recovery.
  • D、Uncommitted changes will be rolled back after the database is opened.
  • E、On startup， perform media recovery and then instance recovery.
  • F、On startup， all the files will be synchronized and you get both committed and uncommitted data.

正确答案:A,D

第5题：

Which two statements are true about the RMAN validate database command?（）

  • A、It checks the database for intrablock corruptions.
  • B、It can detect corrupt pfiles.
  • C、It can detect corrupt spfiles.
  • D、It checks the database for interblock corruptions.
  • E、It can detect corrupt block change tracking files.

正确答案:A,C

第6题：

You need to perform a block media recovery on the tools01.dbf data file in the SALES database by using Recovery Manager (RMAN).Which two are the prerequisites to perform this operation? ()(Choose two)

A. You must configure block change tracking file

B. You must have first level 1 backups for RMAN to restore blocks

C. You must ensure that the SALES database is mounted or open

D. You must have full or level 0 backups for RMAN to restore blocks

E. You must take the tools01.dbf data file offline before you start a block media recovery


参考答案：C, D

第7题：

Which two statements are true about L2TP tunnels?（） (Choose two.)

  • A、Traffic is clear text
  • B、Traffic is encrypted 
  • C、They are initiated by the LNS
  • D、They are initiated by the LAC

正确答案:A,D

第8题：

You need to perform a block media recovery on the tools01.dbf data file in the SALES database by using Recovery Manager (RMAN).Which two are the prerequisites to perform this operation?()

A. You must configure block change tracking file

B. You must have first level 1 backups for RMAN to restore blocks

C. You must ensure that the SALES database is mounted or open

D. You must have full or level 0 backups for RMAN to restore blocks

E. You must take the tools01.dbf data file offline before you start a block media recovery


参考答案：C, D

第9题：

Which of the following statements is NOT true about RMAN？（）

  • A、It improves usability by enabling you to reuse the scripts to perform recovery operations.
  • B、It detects block corruption while restoration and recovery operations.
  • C、It enables you to perform block media recovery.
  • D、It is capable to recover through unrecoverable operations， with only full database backups.

正确答案:A

第10题：

Which two statements are true about precedence values in policy?（） (Choose two.)

  • A、1 is the default precedence.
  • B、A lower number is preferred.
  • C、A higher number is preferred.
  • D、100 is the default precedence.

正确答案:B,D

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