单项选择题
A.The DBMS_JOB package
B.The BACKUP_JOB package
C.The DBMS_BACKUP_RESTORE package
D.The calendar tool in the Operating System （OS）
E.The backup scheduler in Enterprise Manager （EM）
F.The DBMS_BACKUP_SCHEDULER packager inline mode
多项选择题 You work as a database administrator for Supportcenter.cn. While setting up the database for your production environment， you want to create a user according to the requirements in the exhibit. Which three options of the CREATE USER command would you use to achieve this objective？（）
多项选择题 YouworkasadatabaseadministratorforSupportcenter.cn.YouareworkingonOracleDatabase10g.Toforwardclientconnectionstoaninstance，thelistenermustknowinformationsuchasthenameoftheinstanceandwheretheinstance’sORACLE_HOMEislocated.Howdoesthelistenergetthisinformation？（）
单项选择题 YouworkasadatabaseadministratorforSupportcenter.cn.Whilegrantingarole，SELECT_CATALOG_ROLE，toauser，SupportCenter，usingOracleEnterpriseManager10gDatabaseControl，youhaveclearedtheDEFAULTcheckbox.Whatwillbetheresult？（）