I would just be careful with this. I believe that students are able to switch majors there, if there’s space available, AND if the student would have met the admissions threshold to be accepted into the major as a first year student. I’ve often heard it’s best to apply for the hardest program, because then you leave all your other options open should you change your mind.
I will tag others who are more informed on this issue, though, to confirm or clarify anything I misstated (@ucbalumnus, @gumbymom, @eyemgh).