When interviewing a candidate for a business analyst role, employers are looking to assess your analytical problem-solving skills as well as your communication and collaboration skills. Be prepared to analyze a business case study and answer behavioral questions that often test your ability to handle challenging stakeholders or tight deadlines. Business analysts must also be creative thinkers, so expect to tackle a few unusual brainteasers that are designed to see how well you can think through a complex problem.
These vary by what job you're interviewing before, but there's usually a question involved that asks how you'd respond to some rotten work situation. "How would handle picking up slack for an employee that called in sick when you're already behind on your own work?"
Most of these are going to measure your ability to work in a team environment. The answer to the above question would be "Let my Team Lead/Manager know what's happening and ask for help so ALL the work can get completed as needed."