單項選擇題

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.

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單項選擇題

In which scenario will you create a hash cluster？（）

A. when you want the data to be returned automatically in chronological order
B. if the application uses queries joining tables only occasionally
C. if the queries against the clustered table use the equality operator （=） to retrieve the desired row
D. if the full table scan is executed often on only one of the clustered tables

單項選擇題

The performance of your database is affected by the presence of two log members in each online redo log group and the placement of redo log members of a group on the same disk. You decide to place the redo log members of a group on separate disks. Which view will you query to find the name and location of all the online redo log members？（）

A. V$LOG
B. V$LOGFILE
C. DBA_LOG_GROUPS
D. V$LOG_HISTORY

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In which scenario will you create a hash cluster？（）

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In which scenario will you create a hash cluster？（）