The appearance in a job interview has to be of a person dressed appropriately, not like a VIP, and not getting excessive jewelry and smelling perfume, so you should be careful. You shouldn’t have to chew gum or smoke.
It’s important to list the specific skills, experience and employments relevant. I think the qualifications are not important, but if the interviewer asks about some skill that you are deficient you have to be honest and to recognize it with a positive attitude.
During the interview you have to use good manners with the interviewer an be cooperative.
At the end, it’s very important to ask questions about the job, but avoid questions whose answers aren’t important in this moment.