The interview to access the platform primarily consisted of theoretical questions, mainly related to general experience in software engineering and system design. For example, one question was: "If you had a weather app that takes more than 5 seconds to load data for the user, how would you handle it?"
The interviewer was very nice, but we didn't interact much. It felt like they were noting my responses and quickly moving on to the next questions, sometimes rephrasing the question if they felt I didn't understand.
Overall, it was a good experience. Any experienced developer should be able to pass it.