Since the lecture is designed for non-majors and beginners, it seems that the instructor explains how to improve implementation skills first rather than the functions provided by the language. And the quality of the video seems to be very good because it went through the review process of a non-beginner working professional. The lecture is visually appealing and the diction is easy to follow! And usually, Baekjoon or Programmer's problems are brought up (of course, I think this method is good enough), but in my case, even that was often difficult.. I ran the problems uploaded in the code snippet locally and compared the instructor's solution with the code I solved, and it was nice to be able to catch parts that could be caught in the IDE even if there were errors. This time, I will prepare well for the coding test and overcome the tragedy of not being able to apply because of the coding test!