Question: Design the Oscar Health timeline (feature on their app). It's basically a timeline that pulls in different info (e.g. your payment of $20 went through, you had an appointment with Dr. Smith, your prescription for medicine XYZ was filled).

This was pretty much the entire question and interviewer did not provide many hints. They said you should determine where the information is coming from, how it is handled, how it is stored, how it is displayed (frontend), etc.. Since the question was so vague (i.e. you don't even know where the data is coming from), I was completely lost on how to solve this!