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Oracle 19c OCP 认证考试 082 题库(第20题)- 2024年修正版

【优技教育】Oracle 19c OCP 082题库(Q 20题)- 2024年修正版

考试科目:1Z0-082

考试题量:90

通过分数:60%

考试时间:150min

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原文地址:http://www.cuug.com/index.php?s=/home/article/detail/id/3401.html

第20题:

Q 20、

Choose two.

Which two statements are true about Entity Relationships?

A) A table name can be specified just once when selecting data from a table having a self-referencing relationship.

B) A one-to-many relationship in one direction is a one-to one relationship in the other direction.

C) A many-to-many relationship can be implemented only by using foreign keys.

D) A relationship can be mandatory for both entities.

E) A one-to-one relationship is always a self referencing relationship.

Answer:BD

 

(解析:实体关系是关系型数据库中很重要的概念,一对多的关系在某方面可以看成是一对一,因为他们之间都有一对一的属性; 两张表可以组成关联关系。)

 

Oracle 19c OCP认证需要到Oracle指定的WDP机构,有了培训记录之后才能考试,考试需要考2科,分别是082(60%及格)和083(57%及格),两科都通过之后才能拿到证书。证书如下:

 

posted @ 2024-09-12 11:40  cnblogs_5359  阅读(5)  评论(0编辑  收藏  举报