Specifics about working as a Research Analyst McKinsey

Hey,

So next week I will have final round interviews for the position of Research Analyst for a specific region/geographical market at McKinsey (Don't want to give out exact region for anonymity reasons.)

The interview process so far has been conducted through a recruiting firm, with McKinsey only stepping for the very last interview rounds. Therefore, coming into the last interview I still have a very limited view about what I actually would do in the position. The only information I have is that including in the job listing which states I will conduct research and work with incoming "requests" from consulting teams.

Is there anyone here who has worked as a Research Analyst for McKinsey, or for some other reason has a good grasp of the job? I would love to hear some information about the actual concrete work that is done. 

Furthermore, if anyone has any concrete tips on how to prepare for specifically Research Analyst interviews, that would be greatly appreciated. 

Edit: Don't seem to be able to remove the completely irrelevant hyperlink. Ignore it, some algorithm apparently seems to think I'm talking about a book available on Amazon.