052-153

The database instance has the following parameter setting:
OS_AUTHENT_PREFIX = OPS$
OS_ROLES = FALSE
REMOTE_OS_AUTHENT = FALSE
REMOTE_OS_ROLES = FALSE
TIMED_OS_STATISTICS = 0
You have a local operating system user SKD. You create a database user OPS$SKD, and then assign external authentication. The user OPS$SKD has the CREATE SESSION privilege. What would you achieve by the above process?
A.The database user OPS$SKD will be able to administer the database.
B.The authentication detail for the database user OPS$SKD is recorded in the password file.
C.The local operating system user SKD will be able to access the database instance without specifying
the username and password.
D.The database user OPS$SKD has to login with the password of the local operating system user SKD to
access the database instance.

  OS_AUTHENT_PREFIX:用户前缀,比如你的前缀是 OPS$,你的系统用户为 oracle,那么你的数据库账号就应该是OPS$ORACLE
  OS_ROLES:TRUE 表示由操作系统管理所有用户的角色分配,FALSE 表示 Oracle 自身验证和管理角色
  REMOTE_OS_AUTHENT:指定是否允许采用外部验证的方式登录数据库。默认为 FLASE
  REMOTE_OS_ROLES:指定是否允许远程客户端操作系统的角色。 默认为 FLASE
  TIMED_OS_STATISTICS: 指定 Oracle 收集操作系统统计信息的时间间隔
A 错,OPS$$SKD 用户只有 CREATE SESSION 权限
B 错,外部操作系统验证不需要密码
D 错,不需要使用 SKD 用户的密码

原文地址:https://www.cnblogs.com/Babylon/p/8037608.html