Oracle OCP 19c 认证1Z0-083考试(第48题)

 You accidentally drop the CUSTOMERS table, and then recover it by using the FLASHBACK TABLE command.

Which two statements are true about the dependent objects of the CUSTOMERS table?

A)    All the triggers associated with the table are flashed back but are disabled.

B)    Materialized views that use the CUSTOMERS table are flashed back.

C)    LOB segments associated with the CUSTOMERS table are flashed back.

D)    All the constraints defined on the table, except the referential integrity constraints, are flashed back.

E)    Only the primary key constraint created for the table is flashed back, whereas all other indexes must be retrieved separately.

Answer:CD

(解析:drop 表其实相关的东西都没有真正删除,当表恢复后,其它的相关联的东西就可 以用了。为什么外键约束没有闪回,因为在 drop 后,有可能相关联的主键约束被删除了, 所以外键约束要手动启用,故而没有被闪回。 经过实验,物化视图是不会被删除,因为它 本来跟表是独立的, 不管基本是否被删除。)
 

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来源： https://blog.csdn.net/itsaka/article/details/117910473