This may seem like an unreasonable question, but if you think about it from the employer’s perspective, they are trying to hire someone to fill a gap or hole in their team. They have real, usually time-pressing needs and they want to see at least improvements in the issues they’re facing when they hire you. Therefore, be prepared to talk about what you think you will accomplish in a 1 to 3 month horizon. Ideally this is based on a clear understanding of what the job entails and what the company’s challenges are.