The interview is very simple. 3 steps very easy. 1 they will ask your verbally few questions 2 you will have to fill up a form with your skills 3 practical test.

After I applied in store and passed on my CV online I got invited to show my practical skills (those vary. Usually related to basic repairs), I passed, I had an interview with HR manager and they saw I know what I'm doing and that was it :-) I'd strongly recommend previous experience in the technical area.