Customer service is all about handling customers on issues relating to the products of a business. As such, the staff members in this department should be conversant with a lot of information relating to the products. The interviewer will want to find out if the interviewee has an interest in their job and how much research they have done before applying for the position. When answering such customer service interview questions, the interviewee should indicate an understanding of the business environment, nature of operations and target and existing markets for the business.