Oracle 11g OCP认证052考试题库(11)-CUUG内部学员版
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我要咨询11g版本的OCP考试持续了好几年,一直比较稳定,直到2018年4月份左右,052考试不断的出现新的考题,虽然我们收集整理了不少,但新题还是难避免,这样出现一部分新题,我们收集一部分,持续了不短的时间。
对于这些052考试新题,不仅老师给出了答案,学员也积极的找资料、查文档,形成了一份内部综合版本,通过分数非常高,一起渡过这次052考试的难关。
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052考试题-11(OCP考试题库讨论群:101-5267-481 验证:ocp)
Which two are true about Optimizer Statistics?
A)They are gathered by the Manageability Monitor(MMON) background process.
B)They can be gathered by executing the PL/SQL procedures in the DBMS_STATES package.
C)They do not persist across instance restarts.
D)They can be used to determine the events on which a database instance waited.
E)They provide information to the Optimizer so that it can determine optimal execution plans for SQL statements.
F)They are automatically updated when DDL statements execute.
Answer: BE