Thanks to this lecture, I passed the Big Data Analysis Engineer practical exam! In particular, I was suddenly faced with the practical exam and had no idea how to prepare for the test because the 3 types of work-related questions appeared, but the lectures by the instructor 'After-work ttat-tat' really helped me a lot. Although I didn't get a high score on type 3, I got a perfect score on type 2 and an above-average score on type 1, so I was able to pass the practical exam well. Thank you, instructor~~~ And happy new year~!