A DMI is the same as any other job interview. It’ll be largely competency based, so expect to be asked questions surrounding safety and customer service. Safety should form the basis of your answers, as well as customer service. Research the company and be prepared to explain why you want to be a train driver, and what you see as the main attributes of a good driver. Use the STAR technique and be concise in your answers, whilst remaining human (try and come across as serious, at the same time as likeable).