Usually no licence, but often a contractor licence
Working as a carpenter generally requires no individual licence, unlike electrical or plumbing work. Contracting — taking jobs directly from clients above a value threshold — usually does require a contractor licence, and that threshold and its rules are set locally. The distinction matters most at the point where someone starts working for themselves.
Rough and finish are different jobs
Framing is fast, structural, outdoors, and tolerant of eighth-inch variation. Finish carpentry is slow, visible, indoors, and tolerant of almost nothing. Both are carpentry and many people do both, but they suit different temperaments, and knowing which you prefer shapes where you look for work more than any credential does.
The measuring discipline
Most carpentry errors are measurement or layout errors rather than cutting errors, and they compound: a framing wall out of square at one end is out everywhere by the far end. Squaring, levelling, and consistent marking are the habits that separate work that goes together from work that has to be persuaded, which is why the practice test weights them.