Mixpanel Software Engineer Front End interview questions

Started with a phone screen with a recruiter to chat about the company, the role itself to see if it was something I was interested in, and my previous experience. It was followed by an online screening quiz composed of 42 multiple choice questions, and each question has a time limit. Obviously it's the company's choice to use this quiz, but it seems to be a quiz to see if you're a full stack person, not to see if you're fit to be a front end person. There seems to be a mismatch of what the job description requires and what they actually are testing you on.