What is a competency? Firstly, you need to understand what a competency is, to be able to tackle and answer Competence based Questions.
A competency or “Key-competency” as it is more commonly known in the job market, is the ability to do something successfully or efficiently.
In order to demonstrate competence, workers must be able to perform certain tasks or skills with a required level of proficiency
Some employers will focus specifically on questions aimed at certain competencies that they need, to see if you match up. This is called a Competency–based Interview.