Most HR teams worldwide use the competence based interview during their selection process. It has become very popular as it is an effective way of interviewing fairly. If you get it right, it can give you the chance to sell yourself as long as you follow some simple rules.
So, why do employers use the competency based interview? Well, it allows them to determine the exact criteria to measure all the candidates against. By scoring the criteria via a strict question they have asked the prospective employees, they can score each candidate directly against each other, which means that they can clearly demonstrate why they have chose a particular candidate for a specific role.