Hello~! I finally understand what processes, threads, multithreading, and concurrency control are all about😭😭 I had a backend developer interview last week, which I was grateful for, but honestly I couldn't answer the questions well.. But the answers to those questions are hidden in Young-han's lectures..!!!! As you mentioned at the end of the lecture, fundamentals are important and it might seem like going in circles, but you said that's the right approach, so I'm going to study hard by listening to the lectures again!! If it weren't for Young-han's lectures, I probably would have given up on challenging myself to become a backend developer, but thanks to you allowing me to study and take on this challenge, I'm truly grateful! You mentioned that even someone like Young-han comes home from work and spends 2-3 hours thinking and preparing lectures, which made me realize I need to work even harder. Also, I loved how every time you used sleep() and log() during the lectures, you'd say "the ones we made"!😆😆😆 It was great how you'd explain again thinking we might get confused, and the analogies with restaurants and excitement made it so much easier to understand😊😊 Looking back😆😆😆, in March this year I was listening to MVC basics following Young-han's recommended course, but since I'm a bit of an academic type😭😭 and lacked too many concepts, I took Java Advanced 1 instead (but I'm going to fix that, since development studies are different). But😆😆😆 I had written down for a course review: "Young-han's energy was so different - I liked the lively Young-han, but while filming MVC, you seemed so tired yet still fulfilled your responsibility with dedication, wondering what had happened... I listened to the lectures with a grateful heart"😊😊😊😊 Hehe.. Of course,😆😆😆 I also took HTTP Complete together, so😆😆😆 the HTTP lectures were more lively than this one! But I love all of Young-han's lectures whether they're lively or serious!!!! The lecture content is so substantial and packed, so even though the lecture time might be around 10 minutes, the study time takes longer😊😊 But you explain important concepts so well, show them through examples, and I can naturally feel your desire for us to understand and learn well, so I'm truly truly grateful!! Young-han😆😆😆😆 isn't it funny how you laugh in the middle and ask things like "isn't this amusing?"😆😆😆😆 I laugh along like a crazy person...😆😆😆😆😆 These days I spend my weekends with Young-han's lectures on Friday, Saturday, and Sunday, and I think I'll need to continue for several more months.. 😆😆😆😆I've talked too much,, I'll keep fighting from now on!! Thank you!!!!