University of Siegen Exam and Interview.

Hello everyone i just gave my entrance exam where i choose embedded systems. I thought the exam was medium for me. Now i am thinking about Interview round. Do they only ask about embedded systems or they can ask me about visual computing and complex and intelligent software systems( out of these three i choose embedded systems). The exam had only general computer science questions and embedded systems questions. I was locked out from complex and intelligent software system.

If anyone had gave interviews in previous year please let me know so i can be prepared for interview.