Keep it so generic. You need not to give the detailed explanation for this question. Just keep it something simple like this, I am working as business analyst in my current project. I am responsible for gathering requirements from the business, prototyping and demoing, creating test scripts and coordinating everyone to complete the UAT and finally deploying it in Production. I am also responsible for evaluating any new functionalities introduced by Salesforce to see if we can leverage to any of our existing use cases.
