單項(xiàng)選擇題

Which two operations can be flashed back using the Flashback technology？（）

A.DROP USER SMITH；
B.DROP TABLE EMPLOYEES；
C.DROP TABLESPACE USERS；
D.ALTER TABLE SALES_REP DROP PARTITION P1；
E.ALTER TABLE EMPLOYEES DROP COLUMN DESIG_ID；

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單項(xiàng)選擇題

Your database is having two control files， three redo log file groups with two members in each group. Failure of which file would cause an instance to shut down？（）

A.any control file
B.any archive log file
C.one of the redo log members
D.loss of the initialization parameter file
E.any data file belonging to the default permanent tablespac

單項(xiàng)選擇題

You have been recently hired as a database administrator. Your senior manager asks you to study the production database server and submit a report on the settings done by the previous DBA. While observing the server settings， you find that the following parameter has been set in the parameter file of the database： REMOTE_OS_AUTHENT = TRUE What could have been the reason to set this parameter as TRUE？（）

A.to enable operating system authentication for a remote client
B.to restrict the scope of administration to identical operating systems
C.to allow the start up and shut down of the database from a remote client
D.to enable the administration of the operating system from a remote client
E.to disable the administration of the operating system from a remote client

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Which two operations can be flashed back using the Flashback technology？ （）

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Your database is having two control files， three redo log file groups with two members in each group. Failure of which file would cause an instance to shut down？（）

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Which two operations can be flashed back using the Flashback technology？（）

Your database is having two control files， three redo log file groups with two members in each group. Failure of which file would cause an instance to shut down？（）