Tesla Mechanical Engineer interview questions

Applied online, and received an email from HR saying they are interested to learn more about my experiences. After the phone call with HR, she setup a technical interview with one of a engineer manager.

The interview called me at 11 pm without any prior notice. Said working for Tesla is supposed to be demanding so I should be ready for an interview at all hours. Was very hard to understand him over the phone and he was very vague about the role and location. I am still not clear which position/location he was interviewing me for. Expected me to know everything about what Tesla does and how I fit into the company. Asked me some general questions about my current job. This was followed by some technical questions related to Tesla. Needless to say this interview caught me off guard and I performed poorly. I would recommend researching what the company does and being clear on what interview time suits you.