Super Micro Computer, Inc. (Supermicro) Applications Engineer interview questions

on-site interview only since I'm living in bay Area, 4 round and 4 interviewer for each round, first was coding about DFS, second was SQL coding, third was LinkedList coding, 4th was BQ with a senior SDE, at the end, recruiter came in and gives a quick OOD question, whole process took about 3 hours

I applied online and a manager reached out to me 2 days after. Then we had the first interview real quick. 2 days after, we had another interview and some other members from the team also interviewed me as well.