"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."
Have career plan that matches the companies goals and the job posting. Be very clear to answer all questions that are asked because there are multiple questions asked in one each example question your are asked to explain in your work experience.
Be sure to tell them who you are and what motivates you.