I strongly recommend you to click on the following links to get more information about the certificate exam (intermediate level). There is a description of the different parts of the exam: 

http://phobos.xtec.net/eoi/index.php?module=detic_portal&ref=inf_ce

You can also see a sample and do it online:

http://phobos.xtec.net/eoi/index.php?module=detic_portal&ref=an_el_in