单项选择题

A.The command succeeds only if Automatic Memory Managem……

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）

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单项选择题YouareworkingonaninstancestartedusingtheSPFILE.YouwanttomovetheFlashRecoveryAreaofyourdatabasetoanewlocation.YouwanttheFlashbacklogfilestobestoredinthenewlocation.Givenbeloware thestepstoaccomplishthetaskinrandomorder： 1.Shutdowntheinstance. 2.ChangethevalueoftheDB_RECOVERY_FILE_DESTinitializationparametertoanewvalue. 3.ExecutetheALTERDATABASEFLASHBACKOFFcommand. 4.Startuptheinstanceandmountthedatabase. 5.ExecutetheALTERDATABASEFLASHBACKONcommand. 6.Openthedatabase. Selectthecorrectorderinwhichthesetasksneedtobeperformed.（）

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

单项选择题Note the following structures in your database server： 1.Extents 2.OS Blocks 3.Tablespace 4.Segments 5.Oracle Data Block Which option has the correct arrangement of these structures from the smallest to the largest（）

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

单项选择题You executed this command to create a temporary table： SQL> CREATE GLOBAL TEMPORARY TABLE report_work_area （startdate DATE， enddateDATE， class CHAR（20）） ON COMMIT PRESERVE ROWS； Which statement is true about the rows inserted into the REPORT_WORK_AREA table during a transaction（）

A.The rows stay in the table only until session termination.
B.The rows stay in the table only until the next transaction starts on the table.
C.The rows are visible to all current sessions after the transaction is committed.
D.The rows stay available for subsequent sessions after the transaction is committed

单项选择题Your database is open and the LISTENER listener is running. The new DBA of the system stops the listener byusing the command：LSNRCTL> STOP What happens to the sessions that are presently connected to the database instance（）

A.The sessions are able to perform only queries.
B.The sessions are not affected and continue to function normally.
C.The sessions are terminated and the active transactions are rolled back.
D.The sessions are not allowed to perform any operations till the listener is started

单项选择题You have two tables with referential integrity enforced between them. You need to insert data to the child tablefirst because it is going to be a long transaction and data for the parent table will be available in a later stage，which can be inserted as part of the same transaction. View the Exhibit to examine the commands used tocreate tables. Which action would you take to delay the referential integrity checking until the end of thetransaction（）

A.Set the constraint to deferred before starting the transaction.
B.Alter the constraint to NOVALIDATE state before starting the transaction.
C.Enable the resumable mode for the session before starting the transaction.
D.Set the COMMIT_WAIT parameter to FORCE_WAIT for the session before starting the transaction