When we require certification in some field of knowledge, we need to take an exam that checks our knowledge on the subject.
A certification is an official document by which it is verified that a person has specialized knowledge or experience in a subject.
Generally, when we apply for a job we must present certificates about our knowledge, previous studies and experience in other jobs.
Additionally, in some institutes, once we finish the entire academic program, they give us a final exam to verify that we have effectively acquired all the necessary knowledge to carry out this work.
Learn more about certification in: https://brainly.com/question/13136824
