Users are performing a large volume of inserts and deletes on the application tables in the APPS tablespace. You observe that there are several warning alerts being generated for the APPS tablespace space usage metrics. Currently， the warning threshold for the tablespace space usage metrics is set to 70%. 
To make the generated alerts more useful as a problem identification tool， you want to reduce the frequency of alert generation for the tablespace space usage metrics for the APPS tablespace. What should you do？（）

多项选择题Intheparameterfileoftheproductiondatabase，theBACKGROUND_DUMP_DESTparameterissetto$ORACLE_HOME users.Whichtwotypesoffileswouldyoufindinthislocation？（）

A.the alert log file
B.the core dump files
C.the change tracking file
D.the user session trace files
E.the database audit trail files
F.the background process trace files

单项选择题In your test database， you find that a user’s session is executing a lot of SQL statements， resulting in the generation of a large number of trace files. While investigating the reason， you find that SQL trace has been enabled at the instance level.  You want to disable SQL trace， remotely， only for that user session to reduce the volume of trace data being generated.  How do you achieve this objective？（）

A.by setting the SQL_TRACE parameter to FALSE in the parameter file
B.by using DBMS_MONITOR.SESSION_TRACE_DISABLE to disable the tracing for the user session
C.by setting the SQL_TRACE parameter to FALSE by using the ALTER SYSTEM command in the user session
D.by setting the SQL_TRACE parameter to FALSE by using the ALTER SESSION command in the user session

单项选择题Theproductiondatabasehasbeenfunctionalforthelastsevendays.Becauseofapplicationrequirements，someoftheinitializationparameterswerechangedduringruntimewithoutanycomments.Youhavebeenaskedtofindoutthevalueoftheparameterswhentheinstancewasstarted.Whichsourcewouldyouusetolocatethisinformation？（）

A.fixed views
B.the alert log file
C.the parameter file
D.the server parameter file
E.dynamic performance views

单项选择题The backup retention policy is configured as RECOVERY WINDOW 2. You executed the following command in Recovery Manager （RMAN） against your database：  RMAN> REPORT OBSOLETE  What would you see in the output？（）

A.a list of all the expired backups and copies
B.a list of all those files that have been deleted in the last two days
C.a list of all those files that have been recovered within the last two days
D.a list of backups and copies that are outside the range covered by the current retention policy

多项选择题UsingtheLISTcommandinRecoveryManager（RMAN），whichtwopiecesofinformationfromtheRMANrepositorycanbelisted？（）

A.backups that can be deleted
B.stored scripts in the recovery catalog
C.backup sets and image copies that are obsolete
D.only the most recent backup sets or image copies
E.backups that do not have the AVAILABLE status in RMAN repository