单项选择题

What is the maximum number of ARCn processes that can be defined using the initialization parameter LOG_ARCHIVE_MAX_PROCESSES？（）

A.1
B.5
C.10
D.15
E.Depends on system memory resources

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Which background process is responsible for writing the dirty buffers from the write list to the data files during a checkpoint？（）

A.CKPT
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Which of the following statement is incorrect regarding RMAN？（）

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