单选题In which scenario will you issue the following command？（）      SQL> RECOVER DATABASE UNTIL TIME ’2005-10-04 ： 12：09：08’ USING        BACKUP CONTROLFILE；Awhen all the control files are missing and only a binary backup of the current control file existsB

第1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2题：

ou are implementing control file multiplexing. Which of the following choices identifies the method you can use in order to generate the control file copies that Oracle will maintain?（）

• A、Issue ALTER DATABASE BACKUP CONTROLFILE TO filename
• B、Make a copy of the control file with the database shut down
• C、Issue ALTER DATABASE BACKUP CONTROLFILE TO trace
• D、Make a copy of the control file with the database still running 

第3题：

You issued the following statement：  SQL> ALTER DATABASE BACKUP CONTROLFILE TO TRACE；  What will be the result of issuing the statement？（）  

• A、 The control file will be multiplexed.
• B、 The control file will be recreated.
• C、The script containing the CREATE CONTROLFILE statement will be created.
• D、 The binary backup of the control file will be created.

第4题：

In which situation will you run the script containing the following statement？（）   CREATE CONTROLFILE REUSE DATABASE SALES NORESETLOGS ARCHIVELOG        MAXLOGFILES 20        MAXLOGMEMBERS 3        MAXDATAFILES 30        MAXINSTANCES 10        MAXLOGHISTORY 1200        LOGFILE        GROUP 1 （   ’/disk1/prod/orders/db/log1a.dbf’，        ’/disk2/prod/orders/db/log1b.dbf’        ）SIZE 100K        GROUP 2 （   ’/disk1/prod/orders/db/log2a.dbf’，        ’/disk2/prod/orders/db/log2b.dbf’        ） SIZE 100K，        DATAFILE   ’/disk1/prod/orders/db/database1.dbf’，                                           ’/disk2/prod/orders/db/file1.dbf ’；  

• A、 when all the control files are missing and only a binary backup of the current control file exists
• B、 when a multiplexed copy of the current control file is missing
• C、 when all the control files are missing and only an ASCII representation of the binary control file exists
• D、 when the SPFILE is missing

第5题：

You work as a database administrator for Certkiller .com. You added atablespaceto your database. Because of the changes to the physical structure of your database， you performed a backup of the control file to trace. After this， you lost only the control files and the instance aborted due to a hardware failure.  How would you proceed to recover the database？（）

• A、Start the instance and open the database, instance recovery automatically recovers control files 
• B、Create a file based on the contents of the trace file and save it to the control file locations and start the database 
• C、Re-create the database (The recovery of the control file is not possible because you have lost all the control files.) 
• D、Start the instance, in the NOMOUNTstate,re-create the control file using the CREATE CONTROLFILE command stored in the trace file. 
• E、Start the instance and MOUNT the database, then re-create the control file using the CREATE CONTROLFILE command stored in the trace file.

第6题：

You performed a backup of the flash recovery area by using the following command for the first time： RMAN> BACKUP RECOVERY AREA;  Which files in the flash recovery area are backed up？（）

• A、flashback logs
• B、current control file
• C、control file autobackups
• D、incremental backup sets

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第13题：

You have recovered your Oracle Database 10g by using the control file backup because all copies of the current control file have been lost due to a media failure. You open your database by using the following statement：       SQL>ALTER DATABASE OPEN RESETLOGS；   Which of the following options is true about using the RESETLOGS option？（）

• A、 The log sequence is reset to 0.
• B、 All the online redo logs are deleted.
• C、 All the archived redo logs from a previous incarnation become useless.
• D、 The full database backup taken from a previous incarnation can be used in future.
• E、 Only the control file and online redo log files are updated with a new RESETLOGS SCN and time stamp.

第14题：

You work as a database administrator for Supportcenter.cn. You added atablespaceto your database. Because of the changes to the physical structure of your database， you performed a backup of the control file to trace. After this， you lost only the control files and the instance aborted due to a hardware failure. How would you proceed to recover the database？（）

• A、Start the instance and open the database， instance recovery automatically recoverscontrol files
• B、Create a file based on the contents of the trace file and save it to the control file locations and start the database
• C、Re-create the database （The recovery of the control file is not possible because you have lost all the control files.）
• D、Start the instance， in the NOMOUNTstate，re-create the control file using the CREATE CONTROLFILE command stored in the trace file.
• E、Start the instance and MOUNT the database， then re-create the control file using the CREATE CONTROLFILE command stored in the trace file.

第15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16题：

You are maintaining the PROD database for NetFx Corporation. You have configured controlfile autobackup in your database. At 6：00 P.M. on Monday， you issue the following command：       RMAN>BACKUP DATABASE；  At 8：00 A.M. on Tuesday， you are unable to start the database because all the control files are missing. You decide to restore the control files from the backup by using the RMAN> RESTORE CONTROLFILE FROM AUTOBACKUP； command. Which operation should you perform before using the RMAN> RESTORE CONTROLFILE FROM AUTOBACKUP； command？（）

• A、 Start the database in the MOUNT stage.
• B、 Back up the control file to trace.
• C、 Set the DBID
• D、 Issue the RECOVER DATABASE command.

第17题：

In which scenario will you issue the following command？（）      SQL> RECOVER DATABASE UNTIL TIME ’2005-10-04 ： 12：09：08’ USING        BACKUP CONTROLFILE；

• A、 when all the control files are missing and only a binary backup of the current control file exists
• B、 when a multiplexed copy of the current control file is missing
• C、when all the control files are missing and only a script containing the CREATE CONTROLFILE statement exists
• D、 when the SPFILE is missing

第18题：

You have lost all your database control files. To recover them， you are going to use the results of the alter database backup controlfile to trace command. Your datafiles and your online redo logs are all intact.  Which of the following is true regarding your recovery？（）  

• A、 You will need to open the database with the resetlogs command.
• B、 All you need to do is execute the trace file from SQL*Plus and it will perform the recovery for you.
• C、 You will use the resetlogs version of the create controlfile command.
• D、 You will use the noresetlogs version of the create controlfile command.
• E、 You will use the trace file to create a backup control file， and then you will recover the database with the recover database using backup controlfile command

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