(IT) campus recruitment suddenly found that my theoretical level could not keep up at all, and I basically couldn’t solve the written test questions. What should I do?

This thing is accumulated, there is no good shortcut, usually read more IT newspapers, such as Computer News, Computer Literature and so on. A lot of knowledge cannot be learned in universities. Only after you actually work and come into contact with projects can you understand the details. Find a friend who has been working in this industry for 3 or 5 years and ask him to tell you about it. This is the best shortcut!