多項(xiàng)選擇題

You work as a database administrator for Supportcenter.cn. You have set the retention period for Automatic Repository （AWR） statistics to four days and collection interval to 15 minutes. You want to view the statistics collected and stored in AWR snapshot. Which two methods would you use to view the AWR statistics？（）

A.use enterprise manager
B.use DBMS_SQL package
C.use DBMS_AWR package
D.use PRVT_WORKLOAD package
E.query the AWR snapshot repository objects
F.use DBMS_WORKLOAD_REPOSITORY package

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單項(xiàng)選擇題

You work as a database administrator for Supportcenter.cn. In a production environment， users complain about the slow response time when accessing the database. You have not optimized the memory usage of the Oracle instance and you suspect the problem to be with the memory. To which type of object would you refer to determine the cause of the slow response？（）

A.The trace file
B.The fixed views
C.The data dictionary views
D.The operating system log fields
E.The dynamic performance views.

單項(xiàng)選擇題

You work as a database administrator for Supportcenter.cn. The database is open. A media failure has occurred， resulting in loss of all the control files in your database. Which statement regarding the database instance is true in this scenario？（）

A.The instance would hang.
B.The instance needs to be shut down.
C.The instance would be in the open state.
D.The instance would abort in such cases.
E.The instance would be in the open and invalid state.
F.The instance would in the open state， but all the background processes will be restarted.

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You work as a database administrator for Supportcenter.cn. The database is open. A media failure has occurred， resulting in loss of all the control files in your database. Which statement regarding the database instance is true in this scenario？（）

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You work as a database administrator for Supportcenter.cn. The database is open. A media failure has occurred， resulting in loss of all the control files in your database. Which statement regarding the database instance is true in this scenario？（）