Answer:
im not shure what answer you want but heres one i can come up with the reason why they interview then for 15 to 20 minutes is because they want to make shure you are the right person for this job they ask all types of question like (ex: have you ever hade experiance with this kind of job) like those type of question i really hope this helped if not in sorry but i wasnt shure what answer you wanted
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