A.A bitmap is used to record free extents.B.Free extent……

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

单项选择题The database instance is currently using SPFILE. View the Exhibit and examine the error that you receivedwhile running the DB Structure Integrity check. Given below are the steps to recover from the error in randomorder： 1.Shut down the instance， if not already done. 2.Copy one of the remaining control files to a new location. 3.Change the value of the CONTROL_FILES initialization parameter to correspond to the new location of thecontrol files. 4.Start up the database instance to the NOMOUNT stage. 5.Recover the database to the point of failure of the control file. 6.Open the database.  Identify the correct sequence of steps（）

A.1，2，4，3，5，6
B.2，4，3，5，6；1 not required
C.4，5，6，2，3；1 not required
D.5，2，3，4；1 and 6 not required

单项选择题our database instance is started using the server parameter file （SPFILE）. You executed a command tochange the value of the LOG_BUFFER initialization parameter：ALTER SYSTEM SET LOG_BUFFER=32M SCOPE=BOTH； What would be the outcome of this command（）

A.The command succeeds only if Automatic Memory Management is not enabled.
B.The command succeeds， but you need to restart the database for changes to take effect.
C.The command returns an error because the size of the redo log buffer cannot be changed dynamically.
D.The parameter value is changed and it comes into effect as soon as space becomes available in theSystem Global Area （SGA）