【ocp 12c】OCP 062最新考试题库原题解析-第15题

时间：2019-04-23 来源：

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QUESTION 15

Which action takes place when a file checkpoint occurs?

A. The checkpoint position is advanced in t he checkpoint queue.

B. All buffers for a checkpointed file that were modified before a specific SCN are written to disk by DBWn and the SCN is stored in the control file.

C. The Database Writer process (DBWn) writes all dirty buffers in t he buffer cache to data files.

D. The Log Writer process (LGWR) writes all redo entries in t he log buffer to online redo log files.

Correct Answer: B