The process was rigorous and tedious. You're given a dataset (multiple tables) and an open ended questions. The recruiters says that it takes about 4 hours to do, but generously provided a week to get the project submitted. It turned out that it indeed took a week to get it done as you'll have to built things from scratch. The interview process was more like university exam: tell me step by step about gradient decent algorithm. Explain how CNN works. What's the formula for L1 regularization, etc. There are about 10 similar text book or formula memorizations questions. They are pretty easy but can get you caught off-guard since they are not practical. The hard part was interviewing with the manager --I was surprised how moody they are. My interview was at 9 AM, online, and the manager was in her bedroom, just got up from bed with hairs all over the places and cranky (presumably due to lack of coffee).