单项选择题 Youwanttomigrateyourapplicationfromthedevelopmentenvironmenttotheproductionenvironment.Whiledoingthetask，youwantthedatabaseobjectsownedbytheuserDEVUSERinthedevelopmentenvironmenttobemovedtotheuserAPPSintheproductionenvironment.WhichoptionofOracleDataPumpImportwouldyouusetoachievethisobjective？（）

单项选择题 Inyourdatabase，UNDO_RETENTIONhasbeensetto600secandUNDOtablespaceisconfiguredforRETENTIONGUARANTEE.WhichstatementregardingRETENTIONGUARANTEEistrue？（）

单项选择题 Exhibit： View the Exhibit to see the information on existing tablespaces of the PROD database.  You observe that a large volume of INSERTs and DELETEs are happening on the TRANS table residing in the USERS tablespace， and you suspect that the TRANS table is fragmented. Which advisory component would you refer to， in order to find the information about table fragmentation？（）