单选题You find that the database performance degrades while you backup the PROD database using Recovery Manager （RMAN）. The PROD database is running in shared server mode. The database instance is currently using 60% of total operating system memory. You sus

第1题：

Your database runs in NOARCHIVELOG mode， and is backed up every night using RMAN scripts. However， last night your assistant DBA performed a manual operating system backup， instead of running the scripts. Today your database crashed and you now want to use the backups from last night. What do you need todo？（）

• A、You need to perform the restore and recover operations manually, because the backup was made manually. 
• B、First you need to resynchronize the catalog with the control file, and then you can use RMAN to recover the database. 
• C、First you need to add the backup to the catalog using the CATALOG command, and then you can use RMAN to recover the database. 
• D、You can just use RMAN and recover the database, because RMAN automatically updates the catalog with the backup information. 

第2题：

While setting up an Oracle database for one of your critical applications， you want to ensure that the database is backed up at regular intervals without your intervention.What should you do to achieve the objective？（）

• A、configure the database to run in ARCHIVELOG mode
• B、configure the Flash Recovery Area to enable automatic database backup
• C、schedule the database backup using DBMS_JOB package after creating the database
• D、schedule the database backup using Recovery Manager （RMAN）commands after creating the database
• E、schedule the database backup using Database Configuration Assistant （DBCA）while creating the database

第3题：

You are working on the PROD database， which is in NOARCHIVELOG mode. You lost the active online redo log group due to a media failure. How should you recover your database？（）

• A、 Restore the database from a whole consistent backup and start the database in MOUNT mode. Then， open the database with the RESETLOGS option after performing a cancel-based recovery.
• B、 Restore the database from a whole consistent backup and start the database in MOUNT mode. Then， drop the lost redo log group and open the database with the RESETLOGS option after performing a cancel-based recovery.
• C、 Restore the database from a whole consistent backup and start the database in MOUNT mode. Then， clear the lost redo log group and open the database with the RESETLOGS option after performing a cancel-based recovery.
• D、 Do nothing. You do not need to recover the database in this case； an instance recovery will be performed by the SMON process on startup.

第4题：

You find that the database performance degrades while you backup the PROD database using Recovery Manager （RMAN）. The PROD database is running in shared server mode. The database instance is currently using 60% of total operating system memory. You suspect the shared pool fragmentation to be the reason. Which action would you consider to overcome the performance degradation？（）

• A、Configure Java Pool to cache the java objects.
• B、Configure Streams Pool to enable parallel processing.
• C、Increase Shared Pool size to cache more PL/SQL objects.
• D、Increase Database Buffer Cache size to increase cache hits.
• E、Configure Large Pool to be used by RMAN and shared server.
• F、Increase the total System Global Area （SGA） size to increase memory hits.

第5题：

It is a holiday and no transactions are being performed on the database. You took a consistent backup of your database without using Recovery Manager （RMAN）. How would you make use of this consistent backup in RMAN？（）

• A、cannot be used in RMAN
• B、by starting up the database again
• C、by using the CATALOG command of RMAN
• D、by using the RECOVER CATALOG command in RMAN
• E、by re-creating the target control file to rebuild the RMAN repository

第6题：

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

第7题：

You have an Automatic Storage Management （ASM） instance managing the database files of your production database. The database contains ASM files and non-ASM files. Using Recovery Manager （RMAN）， you migrate the complete production database to use the ASM instance. Which statement is true？ （）

• A、 RMAN would relocate all the data files to an ASM disk group and other files to an operating system location， defined using Oracle Managed Files （OMF）.
• B、 RMAN would relocate the ASM files to an ASM disk group and the non-ASM files to an operating system location， defined using OMF
• C、 RMAN would relocate all the database files to an ASM disk group.
• D、 RMAN would change the file definitions in the control file to use the ASM but would not relocate the database files physically.

第8题：

The database is running in the ARCHIVELOG mode. It has three redo log groups with one member each. One of the redo log groups has become corrupted. You have issued the following command during the recovery of a damaged redo log file：   ALTER DATABASE CLEAR UNARCHIVED LOGFILE GROUP 3；   Which action should you perform immediately after using this command？（）  

• A、 You should perform a log switch
• B、 You should make a backup of the database
• C、 You should switch the database to the NONARCHIVELOG mode
• D、 You should shut down the database instance and perform a complete database recovery

第9题：

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？（）  

• A、 Opening the database in RESTRICTED mode
• B、 Opening the database with the RESETLOGS option
• C、 Setting a new DBID for the newly restored database
• D、 Restoring the server parameter file （SPFILE） to the new host

第10题：

You are using the backup scheduler in Enterprise Manager （EM） to schedule a backup of your database. Which type of script does the backup scheduler generate？ （）

• A、SQL script
• B、PL/SQL script
• C、Operating System （OS） script
• D、Enterprise Manager （EM） script
• E、Recovery Manager （RMAN） script