At that time, I thought the same as you, hoping to have a proof to prove myself. However, if people don't look at the certificate when they are really looking for a job, they can pass if they do well in the interview. But it also depends on the nature of the work.

Examination related matters/view/2741AE1752d380eb62946d34.html.

You can also take pre-test training before the exam (of course, you have to pay. Hahaha! ! )

I hope it helps you ~!