Applied online and sent a 1 hour coding online screen interview with dev Interviewer asked me to read question on coderpad and ask them if I had any questions. Question doesn't define highly specific input and output formats, so have to ask for those from interviewer. Unlike most interviews which really strive for correctness, this interview is more testing your object oriented design skills and TDD. For example, I initally proposed to output answer as tuples as opposed to object but the interviewer pushed me towards creating objects but not much direction other than that. I didn't know any of that until I received the rejection email (that is, what they are looking for) which I was pretty shocked by because I finished the whole interview 15 minutes early, didn't receive any negative feedback from interviewer and was able to solve problem without struggling. Appointment email actualy said "no need to prepare" for first interview but seems like there were more dimensions to it than advertised. Your code will be required to compile and run in coderpad and you will be running your code against pre-determined test that you have to copy and paste into the terminal, so make sure you actually know all the APIs you are going to use. Hopefully other devs will be able to read this to not repeat same mistakes, good luck everyone.