They're really not as bad as I expected! The hardest part was making sure I had multiple answers ready since I didn't want my answer to blend in with the other applicants. My interviewer rotated who she started with, allowing each of us to get ample time to think about our responses.
Questions were "What are your biggest strengths/weaknesses?", "Why PT?", "Give an example of a time where you had to go along with a decision that you did not necessarily agree with" and other standard interview questions. There's no way to really prep for these types of questions, just think about experiences during your observation hours that have lead you to pursue the PT profession.
Hope this helps!