I was applying for this kind of job through my university. After sending a CV and cover letter, they called me back after approx 2 week to arrange and phone interview. Interview lasted 40 minutes. Interviewer asked me about my previous projects in school, at home and previous job skills. Just followed my CV and and asked about my current/previous job positions. He didn´t ask me anything theoretical, just some addidtional questions during I was talking about my projects.
I had very positive feelings during interview, he was very kind to me, his english was perfect and clear to understand.
After week I got an offer.