Preguntas de entrevista para el puesto de A Python Engineer/Database Engineer en EverQuote

I was referred by another Startup cooperating with AdHarmonics. The interview contains three rounds. In the first round, I was asked about converting Binary code to Hexadecimal code for RGB. In the second round, the interviewer asked me about a serious of coding questions related to database and SQL. In the third round, I was asked with a brain teaser question.