Examine the following RMAN script：
RMAN> run { debug on；
allocate channel c1 type disk； backup datafile 5； }
Which statement describes the purpose of the script？（）
A. The data file is checked for physical corruption and backed up if found clean.
B. The backup of data file 5 is performed and the interactive messages during the backup are suppressed.
C. The existing backup for the data file is checked and the backup is performed if there are changes in the data file after the last backup.
D. The backup of data file 5 is performed and all SQL statements that are executed during RMAN compilation and their results are displayed
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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
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
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
A. Setting the FAST_START_MTTR_TARGET to set the mean time to recover
B. Setting the RECOVERY_PARALLELISM parameter to twice the number of CPUs
C. Using the DB_RECOVERY_FILE_DEST parameter to set the location for flash recovery area
D. Using the DB_RECOVERY_FILE_DEST_SIZE parameter to define the disk space limit for the recovery files created in the flash recovery area
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.
You want to configure the Flashback Database feature and retain flashback logs for three days.
Presently the database is open and configured in ARCHIVELOG mode. The following steps must be performed in the correct sequence to do this：
1. Set the retention target：
SQL> ALTER SYSTEM SET DB_FLASHBACK_RETENTION_TARGET=4320；
2. Enable Flashback Database：
SQL> ALTER DATABASE FLASHBACK ON；
3. Mount the database：
SQL> STARTUP MOUNT EXCLUSIVE
4. Shutdown the instance： SQL> SHUTDOWN IMMEDIATE
5. Open the database：
SQL> ALTER DATABASE OPEN；
Choose the correct sequence.（）
A. 4， 1， 3， 2， 5
B. 4， 3， 1， 2， 5
C. 2， 4， 3， 5， 1
D. 4， 2， 5， 3， 1
A. ALTER DISKGROUP misc MOUNT
B. ALTER DISKGROUP misc DROP DISK misc2
C. ALTER DISKGROUP misc CHECK ALL NOREPAIR
D. ALTER DISKGROUP misc RESIZE ALL SIZE 1023m
E. ALTER DISKGROUP dgroupA ADD DISK ’/devices/A*’
A. You can use RMAN stored scripts
B. Recovery is faster if data is stored in catalog in addition to the control file
C. You can store backup information of all registered databases in one place
D. Database backups are automatically deleted when they are older than the specified time period
The database is currently open and the temp03.dbf tempfile belonging to the default temporarytablespace TEMP has been corrupted.
What steps should you take to recover from this tempfile loss in an efficient manner？（）
A. Allow the database to continue running，drop the TEMP tablespace，and then re-create it with new tempfiles
B. Shut down the database， restore and recover the tempfile from backup，and then open the database with RESETLOGS
C. Allow the database to continue running，take the TEMP tablespace offline，drop the missing tempfile，and then create a new tempfile
D. Allow the database to continue running，add a new tempfile to TEMP tablespace with a new name，and drop the tempfile that has been corrupted
最新试题
Which three functions are performed by the SQL Tuning Advisor？（）
View the Exhibit and examine the disk groups created at the time of migrating the database storage to Automatic Storage Management （ASM）. Why does the FRA disk group initially have more free space even though both DATA and FRA disk groups are provided with the same size？（）
Which two commands never trigger an implicit rebalancing within the disk group？（）
Which three statements are true about windows？（）
Indentify two advantages of using recovery catalog instead of the control file of the database in Recovery Manager （RMAN）.（）
You want to configure the Flashback Database feature and retain flashback logs for three days. Presently the database is open and configured in ARCHIVELOG mode. The following steps must be performed in the correct sequence to do this： 1. Set the retention target： SQL> ALTER SYSTEM SET DB_FLASHBACK_RETENTION_TARGET=4320； 2. Enable Flashback Database： SQL> ALTER DATABASE FLASHBACK ON； 3. Mount the database： SQL> STARTUP MOUNT EXCLUSIVE 4. Shutdown the instance： SQL> SHUTDOWN IMMEDIATE 5. Open the database： SQL> ALTER DATABASE OPEN； Choose the correct sequence.（）
Which two operations are NOT performed by the DUPLICATE command in Recovery Manager （RMAN） while duplicating a running database？（）
After you have restored and recovered a database to a new host by using a previously performed Recovery Manager （RMAN） backup， which is the best option you would consider for the new database？（）
User SCOTT wants to back out the transactions on the REGIONS table in his schema. As a DBA， which commands must you execute to enable SCOTT to flash back the transactions？（）
Which two statements are true about a job chain？（）