問題文
A new Mule application reads a customer record from the core banking system and a loyalty balance from the marketing system, merges them into one payload that the mobile team asked for, and returns it. In an API-led design, which layer does this application belong to, and why?
選択肢
- None of the three layers, because an application that calls two systems in one flow is an orchestration outside the layered model.
- The Process layer, because it combines data from more than one system of record into a business view that no single system holds alone.
- The System layer, because it reads data from a system of record and returns it in a format that the calling team asked for.
- The Experience layer, because it merges data into the payload shape that the mobile team asked for and returns it to that team.