Very unserious blitz question tech screen. Interviewers got confused about who was supposed to be the interviewer and who the shadower, wasting precious time. SQL is fine, just have to be quick and type like your keyboard is going to ignite in flames, but the product case was unnecessarily ambiguous for the wrong reasons. We get that you need to ask questions to arrive at the right solutions, but when an interviewer with a thick accent spews a bunch of internal abbreviated jargon / acronyms that isn't written out that you have to ask them to spell out, it's a waste of time and just plain obtuse. Feels more like an interview for consultants or aliens on Earth who have to figure out how some internal feature even works (that would be obvious once you're on the job) before even getting to the approaches/solutions. And then the questions you ask will be met with a "Yes" or "No," so you'll probably pass if you're really good at "20 Questions." Man, these DS interviews are starting to become some kind of Data Science Olympiad.