What does Accenture accomplish as a business? 

They are curious to what extent to which you've familiarized yourself with Accenture, what they do, and what they stand for. They're curious what value and priority you'd place on what they have to offer.

Paraphrased from their website, "Accenture works with C-suite executives and boards of the world's leading organizations, offering Strategy and Consulting, Interactive, Technology and Operations services with leading capabilities in digital, cloud and security, across more than 40 industries. They employ 674,000 people serving clients in more than 120 countries." There is a wealth of information available online on their approach, philosophy, and commitments.

The amount of research you perform will be revealed in your answer. Someone who proactively learns as much as they can about a company they're interested in working for reveals their commitment to pursuing the role. Your ambition and willingness to overperform, by going above and beyond in preparing for your interview will be a fair indicator of the level of commitment you'd put into your work. Whereas, someone who doubts they'll get the position will likely put in less effort and time.