First stage is coding so be familiar. The assessment center has a few different parts. For one part you have a oral presentation on a topic you are emailed in advanced, have your points straight and don't read of the page. There is group work, ours was in a group of 4. It was about what value is more important. They are more assessing you on you ability to contribute, voice ur opinion not so much which option u pick, they may have a preference individually tho. Another part is more coding, you'll work with a tech eng, they'll assess how you plan before coding, can do in pseudocode aswell.