单项选择题
	A. ALTER SYSTEM SET DB_RECOVERY_FILE_DEST = ’+disk2’ ;
	B. ALTER SYSTEM SET DB_RECOVER_FILE_DEST = ’+disk2’ SCOPE = BOTH;
	C. ALTER SYSTEM SET DB_CREATE_FILE_DEST = ’+disk2’;
	D. ALTER SYSTEM SET DB_CREATE_ONLINE_LOG_DEST_n = ’+disk2’;
单项选择题 YouaremaintainingtheSALESdatabaseforanorganization.YouhaveenabledtheFlashbackDatabasefeatureandwanttoestimatetheflashbackspacerequiredforfutureoperations.Whichviewwouldyouquerytoestimatetheflashbackspacerequired?()
单项选择题 WhichbackgroundprocesssequentiallywritesFlashbackDatabasedatafromtheflashbackbuffertotheFlashbackDatabaselogs?()
单项选择题 YouaremanagingasingleinstanceOracle10gdatabasethatutilizesthefollowingparameters:WhichofthefollowingsetofcommandsmustyouexecutetoenableFlashbackDatabase?()