Consider examples that you can give to go with your answers and ensure you explain your thinking well and can show that you have the core competencies EY are looking for. (one of my interviews implied that he had checklist of keywords he ticked off when I said them during one of the tasks at the experience day).
I answered vaguely here, however in the next interview I expanded on my interest in their use of technology, how different software is used, bringing in a case study found online and also talking about recent technology developments in other companies.
It's really important to show that you have an awareness of the job role and that you can display real interest in it. Make sure you have past experiences which appertain to the role if it's not related to your degree!