An RMAN backup job fails， displaying the following error message： 
ORA­19809： limit exceeded for recovery files 
Your analysis shows that the Flash Recovery area is full. What would you do to resolve the error？（）

多项选择题An RMAN backup job fails， displaying the following error：  ORA­19809： limit exceeded for recovery files  Your analysis shows that the Flash Recovery area is full. Which two actions could you take to resolve the error and avoid this error in future？（）

A.take the backup of the flash recovery area less frequently
B.increase the value of the UNDO_RETENTION initialization parameter
C.change the value of the WORKAREA_SIZE_POLICY initialization parameter to AUTO
D.change the backup retention policy to retain the backups for a smaller period of time 
E.increase the value of the DB_RECOVERY_FILE_DEST_SIZE initialization parameter
F.increase the value of the CONTROL_FILE_RECORD_KEEP_TIME initialization parameter

单项选择题Youwererecentlyhiredbyanorganizationasadatabaseadministrator.Youareaskedtofindoutwhetherthecurrentlyfunctionallistenerprocess，namedL1，hasbeenpasswordprotectedornot.Youarenotfamiliarwiththefilesystemoftheneworganization.Howwouldyouaccomplishthetask？（）

A.by using the STATUS command of the Listener control utility
B.by using the STATUS L1 command of the Listener control utility
C.by using the SHOW RULES command of the Listener control utility
D.by using the SET PASSWORD command of the Listener control utility
E.by searching for the PASSWORD_LISTENER entry in the listener.ora file

单项选择题Youhavetwolistenerprocesses，namedL1andL2.Boththelistenerprocessesarecurrentlyfunctional.Whileviewingthelistener.orafileonyourdatabaseserver，youfindthefollowingentry：PASSWORDS_L1=（1sanfrjp43）Whatwouldbetheimpactofthissetting？（）

A.The listener process named L1 will disconnect the unauthorized users.
B.The listener process named L1 will be prevented from being started by unauthorized users. 
C.The listener process named L1 will be prevented from being stopped by unauthorized users. 
D.The listener process named L1 will be prevented from being reloaded by unauthorized users.
E.The listener process named L1 will be prevented from accepting connections from unauthorized users.

多项选择题While creating a scheduler window using the DBMS_SCHEDULER package， a user logged in as DBMGR gets the error message insufficient privileges.  Which two commands would you use to resolve this error？（）

A.GRANT dba TO dbmgr;
B.GRANT connect TO dbmgr;
C.GRANT resource TO dbmgr;
D.GRANT hs_admin_role TO dbmgr;
E.GRANT manage scheduler TO dbmgr;

单项选择题In your production database there is a job， CALC_STAT， which has been scheduled to run every Friday at 5：00 p.m. CALC_STAT updates the optimizer statistics for the objects owned by the APPS schema. You want the task to be generic， thereby allowing users to modify the attributes of the task at run time without affecting the original task. Which component of Oracle Scheduler must you define to achieve this？（）

A.Window
B.Program
C.Job class
D.Window group