单项选择题 You plan to control idle sessions that are blocking other sessions from performing transactions. Your requirement is to automatically terminate these blocking sessions when they remain idle for a specified amount of time.  How would you accomplish this task？（）

多项选择题 Using the LIST command in Recovery Manager (RMAN), which two pieces of information from the RMANrepository can be listed?（）

单项选择题 Examine the following PL/SQL block：   DECLARE   my_plans pls_integer； BEGIN  my_plans ：= DBMS_SPM.LOAD_PLANS_FROM_CURSOR_CACHE （sql_id=> ？9twu5t2dn5xd？； END；   Which statement is true about the plan being loaded into the SQL plan baseline by the above command？（）