What are the layers of MuleSoft API?

• A. Data API, Experience API and Process API
• B. Experience API, Process API and System API
• C. System API, Process API and Experience API
• D. Experience API, Data API and Service API

Answer: (B)

In MuleSoft API-led connectivity, APIs are organized into three stacked layers to promote reuse and governance: the Experience API at the top, the Process API in the middle, and the System API at the bottom. The System API exposes core back-end systems and data in a stable, secure way, hiding internal details from consumers. The Process API sits above it and coordinates and orchestrates calls to one or more System APIs to implement business logic and processes. The Experience API lives above all, shaping and aggregating data from Process APIs to fit the needs of a specific consumer or channel, such as mobile apps or partner portals. Data flows from System through Process to Experience, enabling reuse of system access across multiple experiences while keeping security and complexity contained. The standard trio is Experience API, Process API and System API; other named APIs like Data API or Service API aren’t part of this canonical layered stack.