Hello and Welcome to LinuxQuestions,
I'd like to draw your attention to the fact that you're posting the same issue in multiple forums. This is a pretty bad thing to do and is not appreciated since it will make it very difficult both for you and for us to keep track of a thread. Therefore I advice you to only post a question/issue/topic once to keep the focus on it. Furthermore you're question is about certification and therefore should be posted in the
LQ Certification forum where you can also find relevant information. I'm reporting your threads as duplicates. Please ask a moderator to move it to the appropriate forum.
Kind regards,
Eric