While interior designers are also most often qualified to decorate, shaping the aesthetic environment of a space, this is often not their primary job function. The NCIDQ tests design, not decoration.
Architects: don't call yourself an architect unless you're licensed. No for real, it's illegal. Also, don't shy away from working with designers. They are specialized in the psychology of space…who doesn't want to work with that?
It seems that the magazine's URL may have violated a trade name belonging to another business, and the website is now down, so here's our take:
This exam tests interior designers on building and fire codes, and the health, safety and welfare of occupants. Aesthetics does not play a role on this exam.