I am looking for SHORT, max 2 lines answer.
1) What initialization parameter is required for OS authentication of a user?
2) What script creates the database base tables?
3) What is the structure of a row?
4) If you drop a role that a user has, what role will they have?
5) If a system privilege is granted to a user with the admin option
and that user re-grants the privilege to another user, then the system
privilege is revoked from the original user, what happens to the
privilege granted to the second user?

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Clarification of Question by turkishbrain-ga on 18 May 2005 22:46 PDT

I am looking for SHORT, max 2 lines answer.
TIME LIMIT : Thursday, May 19. 15:00PM (Eastern Time)

1) What initialization parameter is required for OS authentication of a user?
2) What script creates the database base tables?
3) What is the structure of a row?
4) If you drop a role that a user has, what role will they have?
5) If a system privilege is granted to a user with the admin option
and that user re-grants the privilege to another user, then the system
privilege is revoked from the original user, what happens to the
privilege granted to the second user?

How about going to otn.oracle.com and checking the documentation?  The
first answer is under the list of books ina  book called reference. 
Is this for an ocp exam or a job interview?

Believe me that I did research on questions and I wasnt sure about
answers I found. I wanted to make sure the answers i got are correct.

And this is not for job interview. I study for exam. ( not an ocp or
any other db exams )

Please confirm my answers.

1) What initialization parameter is required for OS authentication of a user?
ANSWER: OS_AUTHENT_PREFIX specifies a prefix that Oracle uses to
authenticate users attempting to connect to the server.

3)What is the structure of a row?
ANWER: StructureDef that describes the structure of the row

PLEASE CONFIRM :

5)If a system privilege is granted to a user with the admin option and
that user re-grants the privilege to another user, then the system
privilege is revoked from the original user, what happens to the
privilege granted to the second user?
ANSWER: The second user will keep privilege.

4)If you drop a role that a user has, what role will they have?
ANSWER:The security domains of all users and roles granted a dropped
role is immediately changed to reflect the absence of the dropped
role's privileges.