"Business systems analysts work closely with a company's IT systems to optimize operations and maximize its business performance. Employers are looking for candidates with a combination of excellent IT and communication skills as well as an understanding of how the company conducts its business. In preparation for an interview, be ready to discuss your ability to manage multiple projects at once, offer advice around resource allocation, and influence clients to follow your recommendations."
The questions were not difficult, but they did ask "what do you know about banking," which is a very vague question, and the answer can go in many directions.
Since I was interviewing for a technical role, I mentioned the basics of banking, but also that it was moving in a technical direction, like mobile banking.