I had applied online on a graduate internship website for the position and was contacted the following week. A HR rep proceeded to clarify my academic credentials and asked me for confirmation of my experiences as well as my averages. After doing the initial resume screening, she sent me a final e-mail to confirm a phone interview the following week. This was to be a general interview, the first of 3 rounds.
I was asked to reiterate on my academic background, my interests, why exactly I was interested in the company and that position particularly (especially since I was an Engineer applying for a job primarily delving in project finance and management). The whole interview process was quite short; about 20-30 minutes in total with a few minutes at the beginning given to a review of what the position entailed and about Accenture itself. At the end there was a short question period after which she immediately let me know that I had qualified for the next interview round to be held the next week.
The second round was delayed but it was held promptly the week after. It was a situational interview, done over the phone, where I was asked how I would handle a number of situations. From what I'd heard from bulletin boards and friends, this was the toughest round in the interview process. I adopted the STAR (situation, task, action, response) technique to answer the situational questions. The whole interview lasted about 45 minutes at the end of which, I could ask questions about the next steps and anything else that confused me about the job. After that, I was told that I would be contacted by the HR rep who had done my first interview about my results. I received an e-mail within 2 hours that I had qualified for my final round the following week.
After about a week, I went to their main offices where I met a manager and a senior manager who were supposed to make the final hiring decision. The whole interview process lasted about an hour and a half. The first part of the interview was held by the manager who proceeded to interview me very informally. She asked me about why I wanted to get into Accenture and why that particular position and asked me why I had specifically wanted to make the switch from technical engineering to a more business-oriented role. She also asked me to run through my resume, listing where I demonstrated my qualifications, how my qualifications fit into the role, what some of key moments were in each of the jobs I'd held, etc. She took notes constantly and finally called in a senior manager. This round was less of an interview round and was more of a question period for me where I could ask specific questions about what the job entailed. He started off with the norm ('Why Accenture?', 'Why that job?') and then asked me more about my extra curriculars and how I'd been able to handle the whole work load while still in school. After about 10-15 minutes of talking, he asked me if I had any questions about the job and about the company after which I asked him for some particulars. I advise anyone who reaches this particular part of the interview to make sure they prepare good questions. While it's not mandatory to ask questions, it's always a good idea because it shows eagerness and interest and it gives you a way of selling yourself in a subtle manner.
The interview was held on a Friday morning. I was told I would be contacted the following week by the HR rep who had done my first interview once again. As promised, I was contacted about the offer for the internship.
In general, every person I'd dealt with during the entire process was extremely helpful and polite. I was treated with respect and I was given space to talk, ask questions and express myself.