The assignment is more like an open-ended question designed to see how much a candidate can complete within 90 minutes and their engineering thought process. It is a great way to assess a candidate's initiative and problem-solving skills in the real world, where the requirements and expectations of a task are not clearly defined in detail. With limited time and unclear requirements. However, the engineering team members didn't seem to be aligned with the purpose of the assignment. It contradicts the engineering team's expectations. If the team has certain expectations and requirements on how things should be done in the way they think, it would be better to state them clearly in detail and the expected results. The engineering team need to improve the interview progress and be aligned on the expectations of each interview step.