This helps in knowing the methodology of the full stack web developer and also gives an idea of his sharpness and precision in choosing the right toolset. You need to be as specific as possible and go in depth while speaking about the reason of choosing a particular toolset. Show a balance between your ability to develop both on the front-end and the back-end of the web application. It is okay to show that you have more experience in one side of the development game than the other but to demonstrate that you have the ability to work on both the ends of the application.