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？（）

You work as a database administrator for Certkiller .com. You enabled tracing while creating a listener to your database.  What additional information is available to you when you enable tracing？（）

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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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Your database is in ARCHIVELOG mode. You have two online redo log groups，each of which contains one redo member.  When you attempt to start the database， you receive the following errors：（）

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You want to monitor and control the resource usage by sessions. You want to be warned automatically when more than 100 sessions are opened with your database.  What action would you take to achieve this？（）

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Given： When line 14 is reached， how many objects are eligible for the garbage collector？（）

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Exhibit， error You work as a database administrator for Supportcenter.cn. When you try to connect to the database， you get an error （See exhibit）. What could be the possible reason for getting such an error？（）

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When executing a SQL workload，you choose to generate execution plans only， without collecting execution statistics.  Which two statements describe the implications of this？（）

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You are maintaining the database of a company. The listener process， listener1， is configured for remote access. You have issued the following command：   LSNRCTL>STATUS listener1   Which information will NOT be displayed when you issue the above command？（） 

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You work as a database administrator for Supportcenter.cn. Users complain that their query is taking a long time to complete. You suspect the database buffer cache size to be the reason， and you define an alert to be generated when the buffer cache hit metric goes below 85%. When you observe the dynamic performance views， you find that the buffer cache hit ratio is 81% but no alerts are being generated.  What could be the reason for this problem？（）

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