多項(xiàng)選擇題

You are performing a block media recovery on the tools01.dbf data file in the SALES database by using RMAN.
Which two statements are correct in this scenario？（）

A.You must ensure that the SALES database is mounted or open.
B.You must restore a backup control file to perform a block media recovery.
C.You must take the tools01.dbf data file offline before you start a block media recovery.
D.You must put the database in NOARCHIVELOG mode to perform a block media recovery.
E.You can perform only a complete media recovery of individual blocks； point-in-time recovery of individual data blocks is not supported.

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單項(xiàng)選擇題

Your database is open and running in ARCHIVELOG mode. You take RMAN full backups every Sunday night. On Monday morning， while querying the user1.employees table， you receive the following error message：
01578： ORACLE data block corrupted （file # 5， block # 51） ORA-01110： data file 5：
’/u01/app/oracle/oradata/orcl/example01.dbf’
You need to rectify the corruption while ensuring the following： The data file should remain online.
The mean time to recover （MTTR） should be minimal.
You are not using a backup control file， and all the archived logs are accessible.
Which option would you choose？（）

A.flash back the corrupted blocks
B.use the DBMS_REPAIR package
C.use the RMAN TSPITR command
D.use the RMAN BLOCKRECOVER command
E.use the RESTORE DATABASE and RECOVER DATABASE commands
F.investigate the time at which the corruption occurred and perform a point-in-time recovery

單項(xiàng)選擇題

The DB_BLOCK_CHECKING initialization parameter is set to TRUE. What would be the result of this setting on the data blocks being written to the datafiles， every time the DBWn writes？（）

A.The Oracle database will check all data blocks by going through the data on each block， making sure the data is self-consistent.
B.DBWn and the direct loader will calculate a checksum and store it in the cache header of every data block when writing it to disk.
C.The Oracle database will check data blocks belonging to the SYSTEM tablespace only， by going through the data on each block， making sure the data is self-consistent.
D.The Oracle database will check data blocks belonging to the SYSAUX tablespace only， by going through the data on each block， making sure the data is self-consistent.
E.The Oracle database will check data blocks in the SYSTEM and SYSAUX tablespaces only， by going through the data on each block， making sure the data is self-consistent

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You are performing a block media recovery on the tools01.dbf data file in the SALES database by using RMAN. Which two statements are correct in this scenario？（）

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The DB_BLOCK_CHECKING initialization parameter is set to TRUE. What would be the result of this setting on the data blocks being written to the datafiles， every time the DBWn writes？（）

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You are performing a block media recovery on the tools01.dbf data file in the SALES database by using RMAN.
Which two statements are correct in this scenario？（）

The DB_BLOCK_CHECKING initialization parameter is set to TRUE. What would be the result of this setting on the data blocks being written to the datafiles， every time the DBWn writes？（）