单项选择题 Click the Exhibit button and examine the diagram.  You are running a database that takes advantage of features provided by Connection Manager， heterogeneous services， and external procedures. The diagram depicts the components used for the naming method you just configured. Which naming method are you using？（）

单项选择题 You experienced a loss of data files in your database. You did not lose any of your control files. You are going to use RMAN to restore and recover the database. Currently， your instance is shut down.  Which sequence of commands is correct to restore and recover your database？（）

多项选择题 You received this error message because Oracle Net Services cannot locate the connect descriptor specified in the tnsnames.ora configuration file：   ORA_12154： TNS：could not resolve service name Which three actions would be appropriate in helping to resolve the error？（）