The Talent Acquisition was not friendly and rude in asking questions. Even though you already told her the reason she still want to dig more into it until the point was frustrating.

I applied online. After a couple of days they got back to me via email telling me about an assessment interview and documents to prepare, having brought my documents as said in the email, assuming it will be a 1:1 interview. I was shown to a room with a group of people and given a written assessment.