Is this how to conduct a job interview?

If you and say 5 other applicants for a job were given a homework assignment, lets say write a care plan for a hypothetical patient in a hypothetical situation, what would PREVENT one of those applicants from taking their homework and having someone else create the careplan,lets say a friend who works as a nurse and is a expert careplan maker, so that it was not the applicant that made the careplan but the expert careplan maker that made the careplan. This applicant turns in the careplan and gets the job not based on her own work but of someone elses, the expert careplan maker. The other applicants made their own careplans, they did not take their work to the expert careplan maker.
Does this seem right?