By carefully listening to the interviewer's questions, you can gain a lot of information about their operations which you can use later in the interview. For example, this question indicates that the organization programs in C and use volatile keyword in their code. Knowing this helps you align your answers to this and any future questions with the type of work they do. Doing this will encourage the interviewer to begin to picture you in the role they are trying to fill. Carefully listening to the interviewer's questions will also help you provide the answer they are looking for.
