多项选择题

A.It is ignored by the query optimizer.B.It is not used……

Examine the following output：
SQL> SELECT index_name，status FROM dba_indexes WHERE status=’UNUSABLE’； INDEX_NAME STATUS------------------------------ -----------
EIND UNUSABLE
Which two statements about the above index are true（）

A.It is ignored by the query optimizer.
B.It is not used while the index is being rebuilt.
C.The index cannot be rebuilt， and has to be re-created.
D.The index is automatically rebuilt when used the next time

<上一题目录下一题>

热门试题

单项选择题You are working on a new Oracle Database 11g server， where only the software is installed and no database iscreated. You plan to create a database on this server using the Database Configuration Assistant （DBCA）.Some of the requirements set for your database creation task are： 1.Configure the database to operate in shared server mode. 2.Disable automatic maintenance tasks such as optimizer statistics collection. 3.Configure a naming method to help the remote user connect to the database instance. 4.Use Automatic Storage Management （ASM） for storing the database files. 5.Configure daily database backup to flash recovery area. 6.Configure Enterprise Manager Database Control to manage the database. Which of these requirements can be met while creating the database（）

A.4 and 6
B.2，3，4，and 6
C.1，2，4，5，and 6
D.1，2，3，4，5，and 6

多项选择题View the Exhibit. Which statements are true regarding the USERS tablespace（）

A.A bitmap is used to record free extents.
B.Free extents information is managed within the tablespace.
C.Free extents information is managed in the SYSAUX tablespace.
D.The data dictionary tables are updated when extents are allocated or deallocated

单项选择题User A executes the following command to drop a large table in your database：SQL> DROP TABLE trans； While the drop table operation is in progress， user B executes the following command on the same table：SQL> DELETE FROM trans WHERE tr_type=’SL’； Which statement is true regarding the DELETE command（）

A.It fails to delete the records because the records are locked in SHARE mode.
B.It deletes the rows successfully because the table is locked in SHARE mode
C.It fails to delete the records because the table is locked in EXCLUSIVE mode.
D.It deletes the rows successfully because the table is locked in SHARE ROW EXCLUSIVE mode.

单项选择题View the Exhibit to examine the details for an incident. Which statement is true regarding the status of theincident（）

A.The DBA is working on the incident and prefers that the incident be kept in the ADR.
B.The incident is now in the Done state and the ADR can select the incident to be purged.
C.The incident has been newly created and is in the process of collecting diagnostic information.
D.The data collection for the incident is complete and the incident can be packaged and sent to OracleSupport

单项选择题View the Exhibit and examine the parameters. User A executes the following command to update the TRANStable： SQL> UPDATE B.trans SET tr_amt=tr_amt+500 WHERE c_code=’C005’； Before user A issues a COMMIT orROLLBACK command， user B executes the following command on the TRANS table： SQL> ALTER TABLE trans MODIFY （tr_type VARCHAR2（3））； What would happen in this scenario（）

A.The ALTER TABLE command modifies the column successfully.
B.The DDL operation gets higher priority and transaction for user A is rolled back.
C.The ALTER TABLE command waits indefinitely until user A ends the transaction.
D.The ALTER TABLE command fails after waiting for 60 seconds due to the resource being busy