It is a holiday and no transactions are being performed on the database. You took a consistent backup of your database without using Recovery Manager （RMAN）. How would you make use of this consistent backup in RMAN？（）
A、cannot be used in RMAN

B、by starting up the database again

C、by using the CATALOG command of RMAN

D、by using the RECOVER CATALOG command in RMAN

E、by re-creating the target control file to rebuild the RMAN repository

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You want to schedule a job to rebuild all indexes on the SALES table after the completion of a bulk load operation. The bulk load operation must also be a scheduled job that executes as soon as the first file that contains data arrives on the system. How would you create these jobs？（）

A、 Create both jobs by using events raised by the scheduler

B、 Create both jobs by using events raised by the application

C、 Create a job to rebuild indexes by using events arised by the application and then create another job to perform bulk load by using events raised by the scheduler

D、 Create a job to rebuild indexes by using events arised by the Scheduller and then create another job to perform bulk load by using events raised by the application

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下面哪种速率的电信号采用三阶高密度双极性码（HDB3）（）.。

A、2048kBit/s

B、34368kBit/s

C、44736kBit/s

D、155520kBit/s

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下列连接方式中，属于总线拓扑的是（）。

A、网络上的所有工作站都彼此独立

B、网络上的所有工作站都是一部接一部的连接

C、网络上的所有工作站都与一个中央控制器连接

D、网络上的所有工作站都直接与一个共同的通道连接