Dear Professor, Today, the results for the Big Data Practical Exam (빅분기 실기) were announced, so I am leaving a course review. Thanks to your excellent lectures and quick Q&A, I received a lot of help. For those considering taking your lectures, I'm leaving the reasons why I recommend them. 1. The direction for solving problems is clear. -> For Task Type 2 (작업형2), which is worth 40 points, I believe it's important to learn the problem-solving direction and structure. To this end, you created a structure that allowed me to repeatedly master the skills using past exam questions + Kaggle, which greatly helped my learning. 2. The response speed to changes in problems presented by the Data Qualification Exam is very fast. -> For the Big Data Analyst certification (빅데이터 분석기사), I think there's still a lot of variability in the questions as it's a relatively new exam. Whenever changes occur, the updates you provide through announcements meant I didn't need to spend extra time searching for exam-related information myself. (Time-saving) 3. Fast Q&A response time. -> I believe it's important for questions that arise during the learning process to be resolved as quickly as possible. To this end, I tend to ask a lot of questions, and the fast response time was very helpful. Thanks to you, Professor, I was able to smoothly obtain the Big Data Analyst certification (빅데이터 분석기사). Thank you very much! ^^