单选题Your database is in ARCHIVELOG mode. You lost an index tablespace due to a disk failure while the database was open. You have neither a backup of the lost index tablespace nor the scripts containing the CREATE INDEX statements to recreate the indexes. 

第1题：

Your database is configured in NOARCHIVELOG mode. All the control files have been lost due to a hard disk failure but the data files are not lost. You have the closed whole database backup available to you.  Which two statements are true in this scenario？（）

• A、The instance aborts.
• B、The database cannot be recovered.
• C、The database can be recovered by restoring the control files from the backup.
• D、The database remains opened and you have to shut it down with the ABORT option.
• E、The database can be restored till the point of the last closed whole database backup.

第2题：

You lost the index tablespace in your database. You decided to re-create the index tablespace and the indexes in the tablespace. What methods can you use to re-create the indexes？（）

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

第3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.

第4题：

You lost the index tablespace in your database. You are not able to use tablespace point/x7fin/x7ftime recovery on the index tablespace. What could be the reason for this？（）

• 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.

第5题：

You lost the index tablespace in your database. You decided to re/x7fcreate the index tablespace and the indexes in the tablespace.  What methods can you use to re/x7fcreate the indexes？（）

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

第6题：

You are a DBA of your company. You created a database named SALES on an Oracle 10g instance. You have defined an index named INDEX1 on the database table named INVENTORY. Users are complaining that queries accessing the INVENTORY table are running slow. Upon investigation you determine that the tablespace where the index is located is experiencing high I/O and you decide to relocate the index to another tablespace. Which of these will be the best way to accomplish this objective？（）

• A、 Rebuild the index.
• B、 Coalesce the index.
• C、 Drop and re-create the index in the new tablespace.
• D、 Relocate the index using the ALTER INDEX...MOVE statement.

第7题：

Your test database is configured to run in NOARCHIVELOG mode. One of the data files in the USERStablespace is lost due to a media failure. You notice that all the online redo logs have been overwritten since the last backup.  What would you do to recover the data file（）

• A、Take the USERS tablespace offline and re-create the lost data file.
• B、Shut down the instance， restore the data file from the last consistent backup， and restart the databaseinstance.
• C、Shut down the instance， restore all the database files from the last consistent backup， and restart thedatabase instance.
• D、Take the USERS tablespace offline， restore all the data files of the USERS tablespace from the lastconsistent backup， and make the tablespace online.

第8题：

Your test database is configured to run in NOARCHIVELOG mode. One of the data files in the USERS tablespace is lost due to a media failure. You notice that all the online redo logs have been overwritten sincethe last backup.  What would you do to recover the data file（）

• A、Take the USERS tablespace offline and re-create the lost data file.
• B、Shut down the instance， restore the data file from the last consistent backup， and restart the databaseinstance.
• C、Shut down the instance， restore all the database files from the last consistent backup， and restart thedatabase instance.
• D、Take the USERS tablespace offline， restore all the data files of the USERS tablespace from the lastconsistent backup， and make the tablespace online

第9题：

While designing your database， you have created the EMPLOYEEStable as an index-organized （IOT）. You want to create a bitmap index on the JOD_IDcolumn to make queries faster. Which task must have been completed so that you are able to create the bitmap index？（）

• A、 A primary key must have been created.
• B、 A mapping table must have been created.
• C、 An overflow tablespace must have been specified.
• D、 The PCTTHRESHOLD option must have been specified.

第10题：

You lost the index tablespace in your database. You are not able to use tablespace point-in-time recovery on the index tablespace. What could be the reason for this？（）

• 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 dictionary-managed tablespace.
• E、 There is a dependency relationship between a table and its indexes.