I got a call from company recruiter one day and she asked me the basic details and my availability for coming Saturday. Friday I got one more call to confirm my availability and they scheduled the interview. There were 2 rounds of technical interviews on the same day and HR round a week later.

First Stage (2 hours): 1 - 2 -1 interview & Modelling Exercise. firstly they sent me a modelling project an hour before the interview begins involving taking a dataset with 20+ features and preprocessing, modelling and visualising the results. The interview then commences with roughly half the time spent on follow up questions about the project and another half about general work experience. This stage generally went smoothly as the focus is more on your reaction to thinking under heavy time pressure, rather than on delivery. Second stage (3 hours): Talent Selection Assessment. This stage involves an hour of working within a group of people applying for various roles. You're expected to take a business case and come up with a strategy, then write out a powerpoint describing your approach. You then spend half an hour presenting this to senior recruiters acting as clients. There are several breaks during this stage. The first hour is a general presentation by Capgemini about life working there, and there is also a half an hour Q&A with current employees at the end. Generally the first stage went fairly well as it is preferable to random technical questions or a large homework assignment in the days proceeding the interview. However the second stage was a mess for a number of reasons. Firstly my business case had virtually nothing to do with Data Science, which was the role I was applying for, and put my in a fairly disadvantageous position in providing any insight. Secondly the business case presented is very barebones and expects you to assume a number of things before you can even begin to make any progress, which in real life you would simply deal with by liaising with the client. Thirdly, you're supposed to elect roles for each member within the project (technology consultant, project manager etc), yet the criteria for success completely abandons these and treat every group member as if they are supposed to provide equal insights. After several days I got my rejection letter along with feedback. This feedback was completely contradictory, claiming that I was both over-managing when addressing the technology aspects of the project (which is the job I was actually applying for and every other member was from a non-technical background) and too quiet on the strategy aspects (a role I wasn't applying for and have no experience with). My technical input was rated very well, however I didn't show "senior consultant" skills in regards to taking charge of the presentation. This seems ridiculous considering we're sorted into roles, none of which assume a senior role, and this project had nothing to do with the role I was applying for or reflective of the experience I already had as I wasn't applying for a senior position. After sending a message back asking why I was judged on senior criteria when I wasn't applying for a senior position, I was ghosted. The entire interview process seems laboriously long considering it entirely hinges on a presentation about a field you may or may not have any experience with, and relies on a presentation with a team you've never worked with. After following up nobody on my team received an offer either, which implies the process has a large amount of luck involved.