9.23Interview trap: “Should every Salesforce call go through a System API?”

Don't answer:

Yes.

Better:

“If Salesforce is a shared system of record used by multiple processes, a Salesforce System API is a strong reusable boundary. If one simple application is the only consumer, splitting it into another network service may be unnecessary. I'd use the API-led layers where they create real reuse and decoupling.”

Excellent answer.