The job interview is undoubtedly the most important aspect of the selection process. It is doubtful and unusual to get a job without one. Your aim is to convince the interviewers that you’re the best person for the job. If you have been successful in gaining an interview then you should take pride in the fact that your written application has been competitive, however it must be followed by a competitive interviewing style.  Your inability to be competitive could impede on your success in securing the job.