It is advisable for both parties, that the applicant be employed on a trial basis first, until he/she finds out if this is the right career choice.
The employer will be able to see whether or not the applicant is everything the application says he/she is, and to assess his/her capabilities, before making a commitment.
This will help the young person make choices concerning a future profession. The legislation pertaining to probationary periods varies between the countries, therefore, be sure to check your own country's rules and laws.
In the Netherlands, for example, probation may not last longer than two months