It was fun to learn about the internal flow and operation of Spring. When using Spring, I felt like I was shrouded in mystery about how the internal flow works, but as I followed the instructor and developed the code step by step from servlet, it was a lecture where the core principles really came to mind. I learned more about the full MVC pattern in a more fun way. (I was touchedㅠㅠ) The lecture materials were great, the lecture structure was good, and the lecture was not boring and informative. I could feel that the instructor put a lot of effort into making the core principles easy to understand. In this kind of lecture, it is better to learn without asking questions. I will definitely take the next lecture.