單項(xiàng)選擇題

You issued the following command： ALTER DATABASE ENABLE BLOCK CHANGE TRACKING； What will be the result of issuing this command？（）

A. The block change tracking feature is enabled， and the information about the system change number is written in the change tracking file.
B. The block change tracking feature is enabled， and the information about the log sequence number is written in the change tracking file.
C. The block change tracking feature is enabled， and the information about the blocks that are changed since the last backup is written in the change tracking file.
D. The block change tracking feature is enabled， and the information about the locations of the datafiles and the online redo log files are written in the change tracking file.

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單項(xiàng)選擇題

You have configured your database to use RMAN for backup and recovery. You must back up the datafile contained in the TS1 tablespace. The size of the datafile in the TS1 tablespace is 200 MB. You issue the following command from the RMAN prompt to perform a backup of the tablespace：
RMAN> BACKUP TABLESPACE TS1 MAXSETSIZE 100M；
Which statement is true about executing this command？（）

A. The command generates an error.
B. The command backs up the tablespace and creates a backup set of size 200 MB
C. The command backs up the tablespace and creates two backup sets of size 100 MB each.
D. The command backs up the tablespace and creates a backup set with backup pieces of size 100 MB each.

多項(xiàng)選擇題

Your PROD database has been started using the server parameter file. In your PROD database you are using RMAN for backup and recovery operations. You issue the following commands from the RMAN prompt：
RMAN> CONFIGURE CONTROLFILE AUTOBACKUP OFF；
RMAN> BACKUP DATABASE；
Which files from the database will be backed up as a result of this BACKUP command？（）

A. control file
B. all datafiles
C. password file
D. online redo log file
E. archive redo log file
F. server parameter file
G. only the SYSTEM datafile

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You issued the following command： ALTER DATABASE ENABLE BLOCK CHANGE TRACKING； What will be the result of issuing this command？（）

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You issued the following command： ALTER DATABASE ENABLE BLOCK CHANGE TRACKING； What will be the result of issuing this command？（）