How Does the University of California Major and Alternative Major Preference Work In Practice? Strategies?

Depends on the campus, as to whether the second choice major is considered for initial admission. Post #4 lists campus-specific practices.

However, note that, after enrollment, a student in a more competitive major is more likely to be able to switch to a less competitive major than a student in a less competitive major is to be able to switch to a more competitive major.

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