Thank you for your interest in getting NetApp certified!
You can visit our certification web site and simply select the NCSA (Exam number NS0-145) to see more information about the exam and how to prepare.
We have a recommended preparation path for the exam.
Here is a link to the page discussing the exam:
We also offer some practice test items and an FAQ about the exam. Those are listed under Additional Resources.
I hope this is useful to you.