OCP Question

Listers -

I took the Oracle 10g OCP exam and one question in the exam was something I 
have not come across in several years working with Oracle.  I searched google, 
but only found someone has had this happen, but they didn't understand why - it 
was during a database cloning process.

It went something like - You rebuild your controlfile and open your database 
and discover several datafiles have been renamed to /somepath/MISSING##### 
(where ##### is a 5-digit number).

What might that signify?
A. Those are corrupt files?
B. Those are read-only tablespace files?
C. .....
D. .....
E. .....

I don't remember the five choices, but does anyone know why Oracle would rename 
datafiles to .....MISSING#####.

Thanks
Bill--
http://www.freelists.org/webpage/oracle-l


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