单项选择题
At database startup， you discover that one of the disks containing an index tablespace has been lost due to a media failure. A backup of the lost index tablespace is not available. You have all the necessary scripts to recreate the indexes. You need to re-create the indexes in a new index tablespace. Which action must you perform before re-creating the indexes？（）
A. Start the database in OPEN mode， and create a new index tablespace.
B. Start the database in OPEN mode， and drop the lost index tablespace from the database.
C.Start the database in MOUNT mode， create a new index tablespace， and drop the lost index tablespace from the database.
D. Start the database in MOUNT mode， drop the lost index tablespace from the database， open the database， and create a new index tablespace.
相关考题
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单项选择题
Twenty database users are connected to your database. Five of the users are running long queries involving sort operations. The TEMP tablespace is the default temporary tablespace for your database. You are performing offline tablespace backups of individual tablespaces and erroneously execute the following statement： SQL>ALTER TABLSPACE temp OFFLINE NORMAL； What is the result of this statement？（）
A. The TEMP tablespace is taken offline. The users using the TEMP tablespace for sorting are disconnected after their queries complete.
B. The TEMP tablespace is taken offline. The users using the TEMP tablespace for sorting are disconnected and must re-execute their queries.
C. The TEMP tablespace is taken offline. The users using the TEMP tablespace for sorting are not disconnected， but these users must re-execute their queries.
D. The TEMP tablespace is not taken offline. The users using the TEMP tablespace for sorting are not disconnected， and their queries execute successfully. -
单项选择题
You issue the following command on the RMAN prompt. RMAN> REPORT NEED BACKUP DAYS = 5 DATABASE； Which statement is true about executing this command？（）
A. It will display a list of files that need incremental backup.
B. It will display a list of files that need backup after five days.
C. It will display a list of files that were backed up in the last five days.
D. It will display a list of files that have not been backed up in the last five days.
E. It will apply the current retention policy to determine the files that need to be backed up. -
单项选择题
YouaremaintainingyourdatabaseinOracle10g.Whileperforminganincrementalbackupofthedatabase，youwanttobackuponlythoseblocksthathavechangedsincethelastbackup.Whichfilewillyoucreatetoincreasetheperformanceofthebackupoperationwhileperformingtheincrementalbackupofthedatabase？（）
A. redo log files
B. password file
C. control file
D. change tracking file
