I think it would have been really good if I had taken this course when I first studied Spring! I evaluated myself as being able to do personal projects using Spring, but I had never actually written a single test code. ㅎㅎ.. I think it was easier to understand DI, etc. in this course after taking the Java introduction and basics. I'm impatient, but I'll continue the roadmap step by step. Thank you for always giving me great lectures!