The whole interview process was two hours. We were split in to two groups, the first group would do a group assessment and the other would have 1 to 1 interviews.
The group assessment was group work to show how you work in a team. The assessment we had to do was a survival game, we had to do a ranking of items and we all had to agree on it on the end. We ended up passing it and being the first to use the whiteboard in a few months which was weird because it's a group project, why not use the whiteboard?
The 1 to 1 interview is that they'd go through your CV, ask every bit of it and find out how deep your knowledge is on each skills you have listed on your CV. You would also need to know about SAP products, it would be advised to look up interesting articles on how SAP is used in the present as they would ask what you do you know about SAP.