单项选择题
A.renaming the control files
B.dropping a user in your database
C.enabling or disabling redo log archiving
D.dropping a tablespace in your database
E.re-creating the control files， after you lost all the control files in your database
单项选择题 When you try to open your database， you receive the following error： ORA-00205： error in identifying controlfile Where would you find the details required to resolve this error？（）
单项选择题 User SCOTT wants to export his objects using Oracle Data Pump and executes the following command： $ expdp scott/tiger directory = EXPORT_DIR dumpfile = scott.dmp include = table include = view："like ’%DEPARTMENTS%’" content = DATA_ONLY Which task would the command accomplish？（）
单项选择题 Userscomplainabouttheslowresponsetimeofqueries.WhileinvestigatingthecauseyoufindthattheOracleInstanceisnotconfiguredtocacheallofthedatablockstosatisfytheusers’queries.WhichcomponentoftheOracleInstancewouldyouchangetoimproveperformance？（）