单项选择题

You have configured OMF in your database. You enabled the ALTER DATABASE ENABLE BLOCK CHANGE TRACKING； statement to enable the block change tracking feature. What information will be written in the change tracking file？（）

A. the system change number
B. the locations of the redo log files
C. the locations of the datafiles
D. the physical location of all the database changes

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单项选择题

In which scenario， will you issue the following command？（）
RMAN> REPORT NEED BACKUP DAYS 7；

A. to configure RMAN to maintain backup information in the RMAN repository for seven days
B. to configure RMAN to maintain backup information in the control file for at least seven days
C. to display the list of files that have not been backed up for the last seven days
D. to display the list of files that must be backed up within seven days

单项选择题

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.

单项选择题

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.