Can you describe some of the fundamental differences between firmware and other types of software?

To someone who does not have a deep technical background or isn't directly involved in firmware development, firmware may seem like another piece of software. This is due to its dependence on coding and how it is executed using some type of processor. Interviewers may ask you this question because they generally don't understand these differences or want to see how you perceive them. Another purpose may be to test your communication skills and determine if you can describe complex technologies to individuals with little to no technical background.