That really depends on the business unit and what level Graduate is a long process of interviews, group activities and case based evaluation.
Treat it all professionally and trust yourself.
Experienced hires could be anything from one interview or many case based or not. Sell yourself at every opportunity.
Friendly and easy process.
I emailed my eventual Director directly after she gave a presentation during one of my classes in University. I had one short phone interview where they asked how I have contributed to the organisations that I was involved in at school/ how I went above & beyond. Then a week later I had an office interview where I met a manager, a director, and a partner. The manager gave a technical interview about accounting, but since I had never taken an accounting class before I told him honestly that I would probably fail all of his questions. He put the sheet away and we talked about my experience as a captain for the school soccer team instead. The director asked if I had any questions about what it was like to work for PwC as a woman, but didn't ask me any questions about my background (at least that I remember). The partner asked me what was the greatest challenge that I had overcome. I cried as I was giving my answer (yikes), but he got me a water and was very kind. About a week later I got an offer.
Engaging and informative. During my time at PwC they wanted to build the best team they could