Mainly examine Java foundation, middleware principle and project experience; interview time is 30-60 minutes. The scope of Java foundation and middleware investigation will be attached at the end of the article. For the project experience, you can choose a representative explanation. The representative here refers to the project with a slightly higher degree of relevance to the job application and a slightly more difficult project. It is advisable to ensure that the duration of the explanation is about 10-15 minutes. If the project explanation time is short, other inspection points (Java basics and middleware principles, etc.) will be involved in a very in-depth manner, increasing the difficulty of the interview.