单项选择题
A.enable index monitoring and query the DBA_OBJECTS view
B.enable index monitoring and query the DBA_INDEXES view
C.enable index monitoring and query the V$OBJECT_USAGE view
D.enable index monitoring and view the DBA_INDEXTYPE_COMMENTS view
多项选择题 Users in your production database complain that they are getting the following error message while trying to insert rows into the ORDERS table： ERROR at line 1： ORA01654： unable to extend index USERS.ORDERS_IND by 8 in tablespace INDEXES While investigating， you find that the INDEXES tablespace has run out of space and there is no more free space on the disk where the data files are available. Which two actions could you perform to overcome this error without affecting the queries that are currently being executed？（）
单项选择题 In one of your online transaction processing （OLTP） applications， most users frequently modify the values， including the key values， of the application tables. Some users generate application reports by using multiple application tables. What is the best table structure that you can use to gain optimal performance？（）
单项选择题 In your test database， you have created the ORDERS table as an indexorganized table （IOT）. To facilitate faster querying， you have created a mapping table and a bitmap index on the ORDER_FILLED column. You observe that the query performance degrades when users perform a large volume of transactions. While investigating the reason， you find that the mapping table segment is fragmented， leading to poor performance. Which option would you use to defragment the mapping table without affecting the original table data？（）