An initial phone conversation with a recruiter, then an interview with 2 engineers over Zoom. One of them was very rude. She asked me what kind of data structure a stack was.. You know LIFO or FIFO that they teach you at school. So I answered it's LIFO. She goes: WRONG, it's FILO. It took me a second to realize that they're the same thing. When I was trying to tell her that they're the same thing, she said "Yeah it's wrong, it's FILO", and moved on to the next question. Extremely unprofessional and rude. Their offer was so low and way below the average salary; it was ridiculous. It would've been helpful if the recruiter had asked for salary expectations beforehand not to waste anyone's time.