That's the case in some liberal arts colleges, but is not typical, or at least wasn't in the early 00's when I went to school. Then most students did have to d

That's the case in some liberal arts colleges, but is not typical, or at least wasn't in the early 00's when I went to school. Then most students did have to declare a major pretty early, usually when you applied for competitive majors like CS was back then. There was a "University Studies" major which you could be in for the first year if you were undeclared, but it was pretty important to declare a real major pretty quickly.