单项选择题
A.A listener named LISTENER is started.
B.A listener named LISTENER01 is started.
C.A listener named LISTENER02 is started.
D.The START command fails and no listener is started.
单项选择题 ExaminetheRMANcommand：SWITCHDATAFILE’/DISK3/user_data01.dbf’；Whichcommanddoyouneedtoissuebeforeyouissuetheabovecommand，sothatRMANfindsthefileintherestoredlocationof’DISK2/user_data01.dbf’？（）
单项选择题 WhichstatementistrueregardingDynamicServiceRegistration？（）
单项选择题 You are implementing a very simple TCP/IP network. It rarely changes and you would like to use Oracle Connection Manager to filter client requests. Which naming method can you use？（）