单选题One of the tablespaces is read-only in your database. The loss of all control files forced you to re-create the control file. Which operation do you need to perform after re-creating the control file and opening the database？（）A  drop and re-create the

第1题：

You have a read-only tablespace on read-only media. You want to perform a media recovery on the existing data files， but using a backup control file. The backup control file indicates that the status of the read-only tablespace was read/write when the control file was backed up. What should you consider？（）

• A、 take data files from the read-only tablespace offline before performing a recovery
• B、 recovery using backup control file is not possible， so restore all the files from the last full database backup， and then open the database
• C、 drop the read-only tablespace and re-create the tablespace after recovery
• D、 perform a recovery； status of the tablespace in control file will be changed automatically

第2题：

The loss of the control file forced you to re/x7fcreate the control file. After re/x7fcreating it and opening the database， you find that some of the data files are named as MISSINGnnnnn， where nnnnn is a five/x7fdigit number starting with 0.  What could be the possible reason？（）

• A、These are the data files that are corrupted.
• B、There is no SYSAUX tablespace in your database
• C、There is a read­only tablespace in your database.
• D、These are the data files that cannot be recovered.

第3题：

You issue this statement：ALTER DATABASE BACKUP CONTROLFILE TO TRACE；  What does the statement generate？（）

• A、A text copy of the control file.
• B、A binary copy of the control file.
• C、A file containing a SQL statement which will re-create the database.
• D、A file containing a SQL statement which will re-create the control file.

第4题：

You have a read/x7fonly tablespace on read/x7fonly media. You want to perform a media recovery on the existing data files， but using a backup control file. The backup control file indicates that the status of the read/x7fonly tablespace was read/write when the control file was backed up. What should you consider？（）

• A、drop the read­only tablespace and re­create the tablespace after recovery
• B、take data files from the read­only tablespace offline before performing a recovery
• C、perform a recovery; status of the tablespace in control file will be changed automatically
• D、recovery using backup control file is not possible， so restore all the files from the last full database backup， and then open the database

第5题：

You work as a database administrator for Supportcenter.cn. You started the instance using theinit.orafile. You have two control files and three redo log groups in your database. You decided to protect the database against failures by adding one more control file. Which file is the appropriate way to perform this task？（）

• A、Shut down the instance， copy the control file to the third location and open the database.
• B、Abort the instance， copy the control file to the third location， modify the CONTROL_FILES parameter in theinit.orafile and open the database.
• C、Copy the control file to the third location， modify the CONTROL_FILES parameter in theinit.orafile， restart the instance and open the database.
• D、Shut down the instance， copy the control file to the third location， modify the CONTROL_FILES parameter in theinit.orafile and open the database.
• E、Shut down the instance， startup in the mount state， copy the control file to the third location， modify the CONTROL_FILES parameter ininit.oraand open the database.

第6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7题：

One of the tablespaces is read/x7fonly in your database. The loss of all control files forced you to re/x7fcreate the control file.  Which operation do you need to perform after re/x7fcreating the control file and opening the database？（）

• A、drop and re­create the read­only tablespaces
• B、rename the read­only data files to their correct file names
• C、change the tablespace status from read/write to read­only
• D、re­create the read­only tablespace because it is automatically removed

第8题：

You executed the following command to back up the control file： ALTER DATABASE BACKUP CONTROLFILE TO TRACE； What do you find in the trace file？（）

• A、Image of the control file
• B、Location of the control file
• C、Contents of the control file in text format
• D、SQL command to re-create the database
• E、SQL command to re-create the control file
• F、Contents of the control file in binary format

第9题：

In your database， all the tablespaces are locally managed. You started Recovery Manager （RMAN） using recovery catalog and restored the control file by using the following command： RMAN> RESTORE CONTROLFILE;  Which two operations do you need to perform after restoring the control file from backup？（）

• A、shut down and restart the instance
• B、add new tempfiles to the temporary tablespaces after recovery
• C、perform a media recovery and open the database with the RESETLOGS option
• D、perform a media recovery and bring the database to NOARCHIVELOG mode

第10题：

You executed the STARTUP MOUNT command to start your database. For which database operation do you need to start the database in the MOUNT state？（）

• A、renaming the control files
• B、dropping a user in your database
• C、enabling or disabling redo log archiving
• D、dropping a tablespace in your database
• E、re-creating the control files， after you lost all the control files in your database