Assessment Centre - I had my interview first which I found a good thing, it basically consists of a few technical questions about Moody's and the rest very straight forward competency questions. From speaking to others every interview varied depending on which business line you applied for and how your interviewers where in general, so all I could say to you is be yourself! In terms of the tests the accounting test is straight forward just know your balance sheets, the verbal is very easy, the numerical is pretty hard as you do not have enough time and there is also 1 very tough section at the end of that test regarding finance knowledge. Finally the written test is also very straight forward just make sure you clock watch and give yourself enough time as many people did not finish in time.