You have a read­only tablespace on read­only 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 read­only tablespace was read/write when the control file was backed up. What should you consider？（）

单项选择题One of the tablespaces is read­only in your database. The loss of all control files forced you to re­create the control file.  Which operation do you need to perform after re­creating 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

单项选择题YoulostthePRODSTDtablespace，whichwasread write.Thetablespacewasread­onlywhenthelastbackupwasperformed.Howwouldyourecoverthetablespace？（）

A.restore the tablespace from the backup; there is no need to apply the redo information 
B.restore the full database to recover the data up to the point when you performed the backup 
C.restore the tablespace from the backup， and then perform a recovery using the backup control file
D.restore the tablespace from the backup， and then recover the tablespace; all the redo information from the point when the tablespace was made read/write is applied

多项选择题Younoticedthattheindextablespaceinyourdatabaserequiresarecovery.However，insteadofperformingamediarecovery，youdecidedtore­createtheindexesinanewtablespace.Whichtwooptionswouldyouusetoreducethetimeittakestore­createtheindexes？（）

A.ONLINE
B.REVERSE
C.PARALLEL
D.COMPRESS
E.NOLOGGING
F.COMPUTE STATISTICS

多项选择题You lost the index tablespace in your database. You decided to re­create the index tablespace and the indexes in the tablespace.  What methods can you use to re­create the indexes？（）

A.Data Pump
B.SQL scripts
C.SQL*Loader
D.Flashback database
E.Recovery Manager （RMAN） script

单项选择题Youlosttheindextablespaceinyourdatabase.Youarenotabletousetablespacepoint­in­timerecoveryontheindextablespace.Whatcouldbethereasonforthis？（）

A.The index tablespace contains bitmap indexes.
B.The index tablespace contains more than one data file.
C.The index tablespace supports only complete recovery.
D.The index tablespace is not a dictionary­managed tablespace.
E.There is a dependency relationship between a table and its indexes.