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