You are working on an instance started using the SPFILE. You want to move the Flash Recovery Area of yourdatabase to a new location. You want the Flashback log files to be stored in the new location. Given below are
the steps to accomplish the task in random order：
1.Shut down the instance.
2.Change the value of the DB_RECOVERY_FILE_DEST initialization parameter to a new value.
3.Execute the ALTER DATABASE FLASHBACK OFF command.
4.Start up the instance and mount the database.
5.Execute the ALTER DATABASE FLASHBACK ON command.
6.Open the database.
Select the correct order in which these tasks need to be performed.（）

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

单项选择题ViewtheExhibittoexaminetheoutputproducedbythefollowingqueryatthreedifferenttimessincethedatabaseinstancestartedandhasexperiencedworkloadsofdifferentcapacities：SQL>SELECTsubstr（component，0，10）COMP，current_sizeCS，user_specified_sizeUSFROMv$memory_dynamic_componentsWHEREcurrent_size!=0；Whatdoyouinferfromthis（）

A.The database instance is running with manual PGA management.
B.The database instance is running with manual shared memory management.
C.The database instance has the MEMORY_TARGET value set to a nonzero value.
D.All sessions are connected to the database instance in dedicated mode， and no RMAN or parallel queryoperations have been performed