Preparations for KPMG interview


Hi everyone, can anybody please tell me that where can I get a practice of the email exercise for KPMG?
Also, can you people who have already attended the interview for KPMG or Deloitte give me some idea about what questions are asked generally?
As I read through various posts on this forum I found out that we need to present the performance of any company of our choice. Do we present that in the presentation part of the interview? Is it a group or an individual presentation? Do we need to prepare for the presentation beforehand i.e. before going for the interview?
What do we exactly do in the group exercise then?


P.S.- I have already asked this question under a separate topic later deciding to post under a new topic!
Sorry about that!