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【第45题】【062题库】2019年OCP认证062考试新题

Oracle 作者:unix_5359 时间:2019-05-30 13:29:10 0 删除 编辑

45题、choose three

Which three statements are true about the purpose of checkpoints?

A) They ensure that instance recovery starts in the event of an instance failure.

B) They ensure that dirty buffers in the buffer cache are written to disk regularly.

C) They reduce the time required for recovery in case of an instance failure.

D) They ensure that all the dirty buffers are written to disk during a normal shutdown.

E) They ensure that uncommitted transactions are rolled back in case of an instance failure.

Answer:BCD

(解析:checkpoint进程就是给dbwr写的信号,定期的保持,减少实例恢复时间,正常关闭时把所有的脏块写入数据文件。)


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2018年,OCP考试题库经过一场大的变动, 2019年,OCP考试题库变动已经开始了,3月份更新了很多新题,不知道以后还会不会有大的更新。 OCP题库解析3:1015267481,新考题交流群

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