Recommendations for Linux Foundation SysAdmin (CentOS)

I'm doing my LFCSA CentOS 6 based this August 20, any recommendation or anyone who has already done it has any suggestion on what should i focus on and how tough is the test. I currently posses a OpenSUSE 11 Certification, but this is my first hands on, And I'm a little nervous, I've been studying using the SysAdmin for Centos CBT Nuggets and the following site:

http://www.tecmint.com/sed-command-to-create-edit-and-manipulate-files-in-linux/

But Still i dont know what to expect from this test