单项选择题

You work as a database administrator for Supportcenter.cn. Your database is in NOARCHIVELOG mode and you want to perform a backup. Which type of backup would be appropriate in this case？（）

A.Hot backup
B.Online backup
C.consistent backup
D.incremental backup
E.inconsistent backup

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单项选择题

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

A.Information about each Oracle Net connection.
B.Information about each entry in theLinstener.orafile
C.Information about the changed done in the database
D.Information about the different listeners in your system
E.Information about all thenondatabasefiles required to operate the database

单项选择题

You work as a database administrator for Supportcenter.cn. You want to be notified when the number of disk I/O increases by 10% of what it was yesterday. You create a baseline metric for yesterday’s disk I/O performance. How do you use the baseline metrics to achieve your objective？（）

A.Save the baseline in the database
B.Save the baseline in the Database Control Home Page
C.Create a procedure to read and apply the baseline to disk I/O metrics
D.Apply the baseline to the disk I/O metrics in the Mange Metrics page
E.Alter the disk I/O metrics to include baseline by using the ALTER METRICScommnd

单项选择题

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？（）

A.The advisory memory has been turned off.
B.The DB_CACHE_ADVICE parameter has been set to OFF in the parameter file.
C.The STATISTICS_LEVEL parameter has been set to BASIC in the parameter file.
D.The TIMED_STATISTICS parameter has been set to FALSE in the parameter file.
E.The STATISTICS_LEVEL parameter has been set to TYPICAL in the parameter file.