SAP Fiori Design Principles & Fiori Elements
SAP's modern UX approach: role-based, responsive, simple, coherent design and the Fiori Elements floorplan templates.
Fiori questions are the entry point to nearly every S/4HANA UI conversation, and interviewers ask about the underlying design principles - not just "what does Fiori look like" - to see if a candidate understands why SAP moved away from SAP GUI's transaction-dense screens toward a fundamentally different UX philosophy.
Fiori Elements is like ordering a custom suit from a tailor's standard pattern book by giving your measurements (CDS annotations) rather than sewing every seam by hand (freestyle UI5) - you get a well-fitting, consistent result far faster, reserving fully bespoke tailoring for the rare cases the pattern book genuinely can't cover.