The final round of interview process is pretty standard and many question and be found online. I suggest looking up Behavioural questions and answers. It is also worthwhile doing research into the company as well as the division you're applying for.
I applied online. The process took 4 months. I interviewed at Deloitte (Brüssel) in Apr 2022
Interview
They never replied to my emails and they simply forgot about my candidature. In order to have a reply from them, I needed to spam them with emails. They didnt even ignore me because I was not a great fit with the team: whenever prompted they always stated that I received positive feedbacks, yet they simply sent me to another interview... After 4 interviews and a 4 months wait, I have officially given up.
Interview questions [1]
Question 1
Give me an example of your eagerness to learn.
Why do you want to work for Deloitte?
Do you have some knowledge on any industry?
The process was fast, despite the number of applicants that showed up for the interview. the aptitude test was straight forward and strictly timed so one needs to be very quick with it but also make sure to answer all questions.
Interview questions [1]
Question 1
Why Deloitte?
What do you see yourself doing five years from now.