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.
It wasn't really difficult. If you know the cookie cutter questions, you can easily walk through this interview. I have added a question when I interview people: What is your passion when it comes to business analysis? Why do you want to be one?
Understanding a part of the business well enough to come up with effective solutions that require minimal effort and then getting the required buy-in from other people in the organization. The political dynamics are an important reason for doing the job.