Question d’entretien chez Noom

SQL: Joins, sub-queries, ranking Python: Don't remember the exact question - but average difficulty Product analytics: Guesstimate number of people flying in any country at any given point in time and how will you validate if your answer is correct without google. How would you A/B test a pricing change on the website? If you see you start seeing decline in revenue from this change in treatment group. would you stop the experiment and pull the plug? ML Modeling: Data set given, need to feature engineer and build a weight loss prediction ML model within 2 hours what is bias-variance tradeoff? What is regularization? how to interpret co-efficients in linear regression why is collinearity a issue for linear regression and issues interpreting them.