In the Oracle9i Data Guard architecture， what is the purpose of the Log Transport Services？（）

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？（）

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You received these error messages because the client cannot find the desired database：   ORA-12198： TNS：could not path to destination  ORA-12203： TNS：unable to connect to destination  Which action would be appropriate in helping to resolve the errors？（）

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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？（）

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A user receives the following error while executing a query： ORA/x7f01555：snapshot too old Which two options can be the solutions to avoid such errors in future？（）

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Click the Exhibit button. What is the output of the program shown in the exhibit？（）

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Your database in running in the ARCHIVELOG mode. You issue the following command to back up datafile 2 in your database.   RMAN> COPY DATAFILE 2 TO ’D:///ORACLE/ORA90/MYNEWDB/DA2.DBF’；   Which two statements are true regarding the backup created using this command？（）

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Click the Exhibit button.   What is the output of the program shown in the exhibit？ （）

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When you try to open your database， you receive the following error：  ORA-00205： error in identifying control file   Where would you find the details required to resolve this error？（）

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Click the Exhibit button. Which statement is true about the classes and interfaces in the exhibit？（）

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