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2018年的时候，OCP 11g考试题库大更新，052 053出现了很多新题，
2019年，11g即将停考的前期，Oracle又出现了一次大变动，12c出现了很多新题，比如062 063题库大更新
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54题、choose two
Which two statements describe the relationship between a scheduler window, a resource manager plan, and a job class?
A) A scheduler window specifies a job class that will be activated when that scheduler window becomes active.
B) A scheduler window together with a job class, controls resource allocation for a job using that job class in that scheduler window
C) A job class specifies a scheduler window that will be open when that job class becomes active.
D) A scheduler window can control resource allocation by itself.
E) A scheduler window specifies a resource manager plan that will be activated when that scheduler window becomes active.
Answer：BE
(解析：Job Classes 相当于创建了一个job 组，DBA 可以将那些具有相同特性的job，统统放到相同的Job Classes中，然后通过对Job Class 应用ORACLE 中的"资源使用计划"特性，就可以对这些job 执行过程中所需要的资源分配情况进行管理。)
