<p>I got into ucsd, but not nearly for my major (applied for aerospace engineering, got my third choice of undeclared) and not my first choice college. How difficult would it be to switch to AE considering it's impacted?</p>
<p>Nearly impossible. You can not switch to an impacted major at UCSD, generally. Though it may be different as an undeclared, hopefully someone else can clarify.</p>