They asked about a lot of things like data stuctures and algorithms and so on, nothing super specific, mostly general. Then there some behavioral questions and then some brain teaser and puzzle like math questions.
I applied online. The process took 3 weeks. I interviewed at Tesla (Fremont, CA) in Jun 2017
Interview
Simple proces, questions about resume and some technical questions about quality. This was not complicated since I already had background on quality. Most of the questions were regarding projects, how I had done them, process to finish the projects and lessons learned.
Applied online and was contacted by recruiter 2-3 months later. The position is not what I applied for but related, so I accepted to set up an interview. For interview, they asked job related question and some algorithm questions.