Job interviews are usually preceded by the evaluation of CVs submitted by candidates who have applied for a particular job role; recruiters/employers usually invite the best of these candidates to interview. The job interview is considered one of the most useful tools in evaluating potential employees.
Multiple rounds of job interviews may be used where there are many candidates in competition or the job in question is particularly challenging or desirable. Earlier interview rounds usually involve fewer and less important interviewers and will typically last for much less time and go into far less detail than final stage interviews.