Yesterday I gave my Magento Certified Developer exam and passed with a decent score. After sharing my score and success in the exam, most of my friends asked me how to prepare for this exam. So, here I share with you guys what I studied/prepared for this exam.

For passing or getting good score in this exam, you must have very decent experience in Magento. Good amount of projects with both frontend and backend hands-on is highly recommended before taking this test.

I prepared for 2 months, along with my work. Thanks to my wife who allowed me to study for the exam without disturbing or complaining 🙂 In the last 15 days before my test, I thank my Boss who allowed me to also prepare for the exam in the work hours.

First of all, I went through the videos available Free (On-Demand, 40 Hours, Fundamentals of Magento) on Magento website. You can even purchase more videos if you are interested.
http://www.magentocommerce.com/training/on-demand

Then, most of the time I spent on Study Guide PDF. It’s very important because for each question it asks you, you have to dig the Magento source code to find the answer. That also helps you in improving your understanding of Magento architecture.
http://www.magentocommerce.com/certification/ (under Resources Tab)

Once you think that you are now prepared with all the items listed in the Study Guide PDF, you can cross-check it with the Magento Self-Assessment Checklist PDF.
https://www.magentocommerce.com/services/certification

Go through all the articles by Alan Storm in the Knowledge Base section of Magentocommerce website. (Actually, that is the first step I took when starting my Magento career)
Magestore.com has an dedicated blog category for Certification, go through all the topics:
http://blog.magestore.com/category/magento-tutorials/magento-certificate-material/

(If you still have time, I would recommend you to go through the stack overflow answers, related to Magento, given by Alan Storm, Vinai Kopp, …)
http://stackoverflow.com/users/485589/vinai
http://stackoverflow.com/users/4668/alan-storm
http://stackoverflow.com/users/465971/ivan-chepurnyi
Stack Overflow top Magento answerers
You can find many more Magento gurus on StackOverflow.

Considering you have completed all the above mentioned preparation guides, there is no way you can fail in Magento Certified Developer exam!

Best luck.