Product Category in ROS system

Dear all,

I am working in Supplier registration process SRM 7.02 in SUS system.

I have a some doubts or question..

1. We are mentioning the Prodcut category in the Registration Screen. Once the supplier fill the information, they choose one or more product category .Questionarre are send based on product category .After the buyer accept the supplier. Transfer the supplier to ECC system.

          Questions:

                    -The product cateogry is also transferred to ECC system as Source list or some other document??

                    - Is that possible this prduct category and Vendor link . can be created as Supplier list in SAP SRM??

                     - What is the use of Procut category in ROS system..?? only for sending a specific Questionnarie??

Plz carfiy my above points.

Thanks.