First, the advantages and disadvantages of self-study through some online video courses or buy related books to self-study programming. Compared with the advantages of class registration training, the self-study exam will be more flexible, with less economic losses and lower sunk costs. Moreover, from the perspective of long-term development, self-learning ability is very important and indispensable in this rapidly iterative industry. The disadvantage is that in the process of self-study, because there is no supervision of relevant personnel and no like-minded partners around, it is easy to distract attention, especially in today's advanced information technology, and it is impossible to calm down and study; Therefore, self-study requires extraordinary patience and willpower, but also needs to be able to withstand loneliness. Unlike it training institutions, which have professional teachers and course plans, if you choose self-study, you need to have a clear study plan, including the knowledge points, directions and specific arrangements to learn, as well as excellent problem-solving skills. Second, training institutions are relatively self-taught. The biggest advantage of applying for an it training class is that you can have a more systematic and complete curriculum system, a better learning atmosphere, teachers and classmates to help you study together, and your learning motivation is relatively higher. However, the investment in class registration is relatively greater. In fact, self-study exam and it training class have their own advantages and disadvantages. The key is to choose according to your actual situation. But for some students with zero foundation, weak foundation and poor self-discipline, it will be better to study systematically through IT training institutions.