单选题The size of the largest datafile， data1.dbf， in your database is 30MB. You issued the following command：   RMAN>CONFIGURE MAXSETSIZE 10MB；     What will be the impact of the above setting？（）AWhile performing the backup of the datafile，data1.dbf，one bac

第1题：

You execute a command to resize a data file， sales.dbf， of size 200 MB in your database： ALTER DATABASE DATAFILE ’/remorse/sales.dbf’ RESIZE 150M；  Which statement is true about this command（）

• A、The command must be issued in MOUNT state.
• B、The command succeeds only if the data file is offline.
• C、The command must be issued when the database is in the archivelog mode.
• D、The command succeeds if no extent in the tablespace is currently allocated above the 150 MB boundary of the file.

第2题：

The size of the largest datafile， data1.dbf， in your database is 30MB. You issued the following command：   RMAN>CONFIGURE MAXSETSIZE 10MB；     What will be the impact of the above setting？（）

• A、 While performing the backup of the datafile，data1.dbf，one backup set is created.
• B、 While performing the backup of the datafile，data1.dbf，two backup sets are created.
• C、 While performing the backup of the datafile，data1.dbf，three backup sets are created.
• D、 While performing the backup of the datafile，data1.dbf，the command for performing a backup of the datafile，data1.dbf，will fail.

第3题：

You configured the default backup device type as disk for RMAN backups. In your database，because of business requirements，you have to take a simultaneous duplicate backup of the data files when the RMAN BACKUP command is used.  What must you set using the RMAN CONFIGURE command to achieve this？（）  

• A、 MAXSETSIZE TO 2
• B、 DEVICE TYPE DISK PARALLELISM 2
• C、 RETENTION POLICY TO REDUNDANCY 2
• D、 DATAFILE BACKUP COPIES FOR DEVICE TYPE DISK TO 2

第4题：

Another DBA issues a shutdown abort command on a database on which you were running an online backup. What will happen when you try to restart the database？（）  

• A、 Oracle will automatically take the datafile out of hot backup mode，generate a warning message，and then open the database.
• B、 Oracle will automatically take the datafile out of hot backup mode and then open the database.
• C、 Oracle will generate an error when trying to open the database，indicating that a datafile is in hot backup mode.You will need to correct this error before you can open the database.
• D、 The database will open with the file in hot backup mode. You can restart the backup at any time.
• E、 The datafile in hot backup mode will be corrupted and you will have to recover it.

第5题：

Given the script   create script db_backup_datafile_script  {backup datafile and 1， and2 plus archivelog delete input；} Run {execute script db_backup_datafile_script using 2；}   What is the result of running this command？（）  

• A、 The script will fail since you instructed RMAN to back up only one datafile rather than two
• B、 The script will successfully back up datafile 3 without error
• C、 The script will fail since it uses a substitution variable which is not supported
• D、 The execute script command will prompt for the value of and2 since it’s not included in the command
• E、 The script will fail because you cannot use the plus archivelog command when backing up

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第13题：

What is the impact of the results of the output of the following command？（）   RMAN> report unrecoverable database；  Report of files that need backup due to unrecoverable operations  File Type of Backup Required Name  4 full or incremental C:///ORACLE/ORADATA/ORCL/USERS01.DBF  

• A、 There are no backup sets with any backups of the users01.dbf datafile.
• B、 The users01.dbf datafile has had unrecoverable operations occur in it. It will need to be backed up or some data loss is possible during a recovery.
• C、 The users01.dbf datafile is corrupted.
• D、 The users01.dbf datafile backup exceeds the retention criteria.
• E、 The last backup of the users01.dbf datafile failed and must be rerun.

第14题：

You issued the following RMAN command：  RMAN> CONFIGURE CONTROLFILE AUTOBACKUP ON；     What is NOT an impact of using the above command？（）

• A、 When a successful backup is recorded in the RMAN repository， then a backup of the current control file is performed.
• B、 When a structural change is made to the database， then a backup of the current control file is performed.
• C、 When a successful backup is performed in the RMAN repository， then a backup of the spfile is performed.
• D、 When a structural change is made to the database， then a backup of the alert log file will be performed.

第15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.

第16题：

Your database is in ARCHIVELOG mode. On Friday evening， you perform an online database backup by using the BACKUP DATABASE command at the Recovery Manager （RMAN） prompt and close the  database. On Monday， the System Administrator informs you about the failure of two hard disks. One of the lost disks contains two datafiles， HR1.DBF and HR2.DBF， both of which belong to a read/write tablespace named HR. The disk also contains a datafile， USERS.DBF， which belongs to a read/write tablespace named USERS. You need to restore and recover the database backup that was performed on Friday evening. After mounting the database， you issue the following RMAN commands：        RMAN>RESTORE DATABASE；        RMAN>RECOVER DATABASE；   After successfully executing these RMAN commands， you issue the following statement using SQL*Plus：        SQL>ALTER DATABASE OPEN；   You receive the following errors when attempting to open the database：        ORA-01157： cannot identify/lock data file 10 see DBWR trace file        ORA-01110： data file 10： ’D:///USERS.DBF’   What is the cause of these errors？（）

• A、 The USERS.DBF datafile is corrupted and cannot be restored by RMAN.
• B、 The USERS.DBF datafile was not backed up using the RMAN BACKUP DATABASE command.
• C、 The USERS.DBF datafile was not restored using the RMAN RESTORE DATABASE command.
• D、 The USERS.DBF datafile was not recovered using the RMAN RECOVER DATABASE command.

第17题：

You are managing an Oracle Database 11g database. You want to take a backup on tape drives of the USERS tablespace that has a single data file of 900 MB. You have tape drives of 300 MB each. To accomplish the backup， you issued the following RMAN command：   RMAN>BACKUP SECTION SIZE 300M TABLESPACE users；   What configuration should be effected to accomplish faster and optimized backups by using the above command？（）

• A、 The SBT channel must be configured， with the default parallelism setting for the SBT device set to 1
• B、 The COMPATIBLE initialization parameter for the database instance must be set to at least 10.0
• C、 The SBT channel must be configured， with the parallelism setting for the SBT device set to 3
• D、 The SBT channel must be configured， with the MAXPIECESIZE set to 300 MB

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