Job Interview is a process in which a potential employee is evaluated by an employer for prospective employment in their company, organization, or firm. A typical job interview has a single candidate meeting with between one and three persons representing the employer; the potential supervisor of the employee is usually involved in the interview process. A larger interview panel will often have a specialized human resources worker. The meeting can be as short as 15 minutes; job interviews usually last less than two hours. The bulk of the job interview will be the interviewers asking the candidate questions about their history, personality, work style and other relevant factors to the job. The candidate will usually be given a chance to ask any questions at the end of the interview. Questions are strongly encouraged, not only do they allow the interviewee to acquire more information but they also demonstrate the candidate's strong interest in the position and company. A candidate should follow up the interview with a thank you letter expressing their appreciation for the opportunity of meeting with the company representative. The thank you letter ensures that the candidate will stay fresh in the interviewer's mind.