There was basically 2 rounds one is technical and another is hr. Technical Round is depend on the case study which is shared initially to you. You have to complete the assignment so that you will be applicable for the next round. Assignment is not tough but tricky. Interviewer is also supportive and collaborative.

In T-systems interview process is fast compare to other companies for me it just took 1 day, same day I had a two technical round followed by HR round. In next 2-3 days offer is with me.