I applied online. The process took 2 weeks. I interviewed at Czech telecommunications infrastructure (Prague) in Sep 2015
Interview
Very kind supervisor David Jarousek. It was very easy, no specific questions. They want to familiarity with you. Moreover after that intern you can switch department to another ones. No specific background needed, only your willing. There is a person, who can help you with any questions after passing the interview.
Interview questions [1]
Question 1
What do you want to do?
What do you want to know?
What do you expect from job?