As a senior technical support engineer, you need to be familiar with virtually every component within your support equipment. This doesn't mean knowing down to the part number, but a general knowledge of each component, what they do, and what issues they can cause that you will need to address. This is an example of this type of question. Interviewers will ask you this question to understand your technical knowledge and learn how well you communicate technical issues to non-technical individuals. This is because your work supports the company's business operations, and you'll be collaborating with people from across the company who do not have the same technical background.
