Oracle: What are the various types of RollBack Segments?

Question

Below is the one of the interview question which was held by Oracle

If a transaction is very large, and the rollback segment is not able to hold the rollback information, then will the transaction span across different rollback segments or will it terminate?

Answer 1

Public Available to all instances
Private Available to specific instance

Answer 2

Please follow the below link:

http://www.dba-oracle.com/t_grid_rac_rollback_segments.htm