An Unexpected Result

When I came back from work I found the result of Japanese Language Teachers' Exam. I passed it with a grade B which is 70-79% correct. Indeed I felt that I could answer most of the questions without any wonder but I thought it was because the questions had a catch in them and I was just simply tricked. I didn't study especially for the exam and I had not learnt all the subjects so I thought taking exam would be just waste of money. But now I'm very happy to make a right decision. I can have a good holidays having this good news. However the problem is how much effective the certificate is when I look for a job as a Japanese teacher.