Business Analyst applicants have rated the interview process at Deloitte with 3 out of 5 (where 5 is the highest level of difficulty) and assessed their interview experience as 100% positive. To compare, the company-average is 81.4% positive. This is according to Glassdoor user ratings.
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After sending in my resume and motivation letter I was asked to do an online assesment. This consisted of two parts: questions about competencies and 4 different tests on reasoning (verbal, abstract, etc). I was called for an interview later that week.
The interview, which was with one consultant and someone from HR, was focussed on my motivation for the job and Deloitte, and some standard questions about resume and personal characteristics. After that here was a small business case, which relied pretty heavily on calculations and took about 20 minutes. Afterwards the results of the assesment were shared.
Interview questions [1]
Question 1
There were quite a lot of questions on motivation for Deloitte, which I hadn't anticipated in a first interview.
I applied through college or university. The process took 2 weeks. I interviewed at Deloitte (Boston, MA) in Jan 2013
Interview
Be very prepared for case interview questions. Use their website to review. The case interviews are not terribly difficult but you need to practice them in order to get the flow and structure of the questions down. Process is pretty simple. First round two case interviews. Second round is 3 cases.
I applied through an employee referral. I interviewed at Deloitte (Chicago, IL) in Sep 2013
Interview
I got the interview because a senior partner recommended me for it. Any partner in good standing can arrange for you to get past the resume screeners for an interview.
First, there was a screening interview over the phone. This went very well, with normal interview questions about my background and the expectation that I would ask 2-3 questions about Deloitte. The point was to see if you can hold a conversation and act professionally.
Then, there were two first round interviews, a behavioral and a case interview. I also did well on the behavioral interview. I prepared by getting the top interview question list from my CSO and making notecards with the interview question on the front and my desired response on the back. I came up with about 20-25 notecards. This strategy worked well. There was only one question that I didn't see coming and I was able to give a few really solid answers to the ones I had prepped. On the last question, the interviewer even said: "Wow. That was a fantastic answer." :)
Where I ran into trouble was the case interview. My preparation was not well-suited to the interview. This was an interviewer-led case interview. After the initial prompt, there were 6 specific questions that the interviewer posed to me. Some were: "Given X, what factors would you consider in making your recommendations." But the ones that really killed me were the math questions. There were two of them. YOU HAVE TO PRACTICE MATH BEFORE THE CASE INTERVIEW. What is 20,000 times 60? What is 300 times 50? What is 50 million times 20? You have to be able to do these calculations quickly and confidently. Moreoever, you have to be able to do them consistently because one mistake can screw you over. Otherwise, before you know it you're stumbling and bumbling and you have lost the interview.
Bottom Line: The case interview is EXACTLY like Deloitte says it is on their website, just with harder math.
Interview questions [1]
Question 1
Tell me about a time you brainstormed in a team environment.