oldguo-MySQL 8.0 OCP 原题解析-Q10

Question 10:

Examine this statement:

mysql> DROP ROLE r_role1, r_role2;

Which two are true?

A) It fails if at least one of the roles does not exist.

B) You must revoke all privileges from r_role1 and r_role2 before dropping the roles.

C) Existing connections can continue to use the roles' privileges until they reconnect.

D) You must revoke r_role1 and r_role2 from all users and other roles before dropping the roles.

E) It fails if you do not have the ADMIN OPTION of the roles r_role1 and r_role2.

F) It fails if any of the roles is specified in the mandatory_roles variable.