Do your homework. Our website provides a lot of information on our Shared Values and the projects we work on, and the testimonials can give you insights into life at Deloitte.
During an interview, your CV is the source of truth. Think about relevant examples from your own experiences that demonstrate our values to share with us during the interview.
If specific technical preparation is required, your recruiter will inform you.
Know who you will have in front of you, connect with your interviewer on LinkedIn and take a look at their profile.