1Z0-053單項(xiàng)選擇題每日一練(2019.01.21)

單項(xiàng)選擇題
You have lost all your RMAN backup set pieces due to a disk failure. Unfortunately， you have an automated cross-check script that also does a delete expired backupset command. You have restored all the backup set pieces from tape. What command would you use to get those backup set pieces registered in the recovery catalog and the control file of the database again？（）
A. register database
B. recover catalog
C. load backupset
D. synch metadata
E. catalog start with
單項(xiàng)選擇題
For Oracle 11g， Oracle strongly recommends that you configure your database to use which of the following memory-management features？（）
A. Automatic PGA Memory Management
B. Automatic SGA Memory Management
C. Automatic Shared Memory Management
D. Automatic Memory Management
E. Manual SGA Memory Management
F. None of the above
單項(xiàng)選擇題
Which of the following statements is true when the database is in ARCHIVELOG mode and tablespaces are in hot backup mode？（）
A. Archive log generation is suspended until the tablespaces are taken out of hot backup mode.
B. Datafiles are not written to during hot backups.
C. Changes to the database are cached during the backup and not written to the datafiles to ensure that the datafiles are consistent when recovered.
D. The datafile headers are not updated during the backup.
E. The way data is written to the online redo logs is unchanged during the backup.
單項(xiàng)選擇題
You want the ability to recovery any time within the last seven days and therefore you configured the recovery window retention policy using the command： RMAN> CONFIGURE RETENTIOH POLICY TO RKCOVFRY WINDOW OF 7 DAYS； After configuring the recovery window， you performed the database backup as follows：（）
A. Backup RB1 at log sequence number 12871 on 5th Jan
B. Backup RB2 at log sequence number 15622 on 12th Jan
C. Backup RB3 at log sequence 16721 on 15th Jan
D. On 20th Jan when the log sequence number was 18112 you realize that there Is a need to a point in time at the beginning of the recovery window. You have all an hived redo log files to date.
單項(xiàng)選擇題
Examine the following command： ALTER DISKGROUP data MOUNT FORCE； In which scenario can you use the above command to mount the disk group？（）
A. when ASM disk goes offline
B. when one or more ASM files are dropped
C. when some disks in a disk group are offline
D. when some disks in a failure group for a disk group are rebalancing

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