An applicant should be polite, and able to listen to the employer. The employer will want to know why they are applying for the job, and may explain what the job details are. An applicant who listens carefully will be able to answer the questions fully and truthfully without much hesitation. The applicant should also make sure they introduce themselves as well as hand over a resume and cover letter for the position that they are applying.
During the meet and greet portion of the interview, the applicant should greet their potential employer with formal courtesy. You should also be able to display confidence and professionalism, to make a good impression.