What questions should you ask a programmer when you interview him?

First of all, do you have any experience in interviewing programmers?

Interview inexperienced programmers, just ask some questions about ssm, ssh, multithreading and so on, and then ask if you can understand front-end technology.

If you have experience, look at his resume and ask about the items on his resume. You can ask questions around the items on his resume and expand them to ask other questions through the technical points involved in his answer.