I passed the practical exam with a score of 95 on my first attempt. Usually, when preparing for other qualifications, I studied using materials floating around on the internet or personal blog materials. However, Big Branch is a newly established qualification, and the type has recently changed, so I was at a loss, but I happened to find this lecture, and although I was skeptical at first, I studied hard with the mindset of just giving it a try. I think you can pass the exam just by listening to the lecture, and if you are anxious, you can go to Kaggle and practice. By the way, the data preprocessing problems posted on Kaggle are more difficult than the exam problems, so don't be discouraged and say you can't solve them. Also, if you have questions during the lecture, you can post them in the [Community], and they will answer them relatively quickly, which was really great. Anyway, I strongly recommend that those preparing for Big Branch practical exams take this lecture. The lecture may seem expensive, but it was really worth the money. Thank you again to the instructor!!