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Which step do you need to perform to enable a user with the SYSDBA privilege to log in as SYSDBA in iSQL*Plus？（）
A:The user must be granted the database administrator （DBA） privilege.
B:The user must be listed in the password file for the authentication.
C:No special setup is needed for the user to connect as SYSDBA in iSQL*Plus.
D:Set up a user in the Oracle Application Server Containers for J2EE （OC4J） user manager，and grant the webDba role to the user.

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出自：Oracle认证

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