Hi Andrew,
take a look at the following link: http://support.sas.com/certify/creds/samples/
Scroll down towards the end to Platfrom Admin and take a look at the example questions.
For a question such as
"The location of the repository manager physical files can be found in"
one of the topics you could read up on is:
http://support.sas.com/documentation/cdl/en/bisag/68240/HTML/default/viewer.htm#p1n3ivrea2b8fgn1at5j...
Being aware of the Metadata Server, its config files and log files.
For a question such as "By default, which groups have WriteMetadata on the Foundation repository?",
looking over the authorization part of the Platform will prepare you.
If you haven't seen the questions on the link I referenced, one of the ways to approach the exam is reading
up on the chapters around the questions.
You can see what's about security, config files, users/groups, SAS servers etc.,
so you can work with the SASMC Admin Guide, Platform Admin Guide and Sec Guide to go through the
areas covered in that certification.
See http://support.sas.com/documentation/onlinedoc/intellplatform/tabs/admin94.html
to find the admin guides I mentioned above.
Hope that helps!
Good luck!!
Feel free to post any questions you might have regarding any of the chapters/questions on the
ref site.
Thanks
Anja