单项选择题 You create two resource plans，one for data warehouse loading jobs at night and the other for application jobs at day time. You want the resource plans to activate automatically so that the resource allocation is optimum as desired by the activity.  How would you achieve this？（）

单项选择题 TheDB_BLOCK_CHECKINGinitializationparameterissettoOFF.Whichblockcheckingwouldbeperformed？（）

单项选择题 A database is running in ARCHIVELOG mode and regular backups are performed. A user receives the following error message： Which is the recommended sequence of operations you need to perform for the query successfully？（）