I’m presently studying for the Magento Developer Plus certification. I hope to take the exam in early June and I’ve created a study plan to accomplish this.
First, I’m reading the excellent and free (with sign-up) Magento User Guide. I’m fairly new to Magento and knowing how the platform works as a shop owner and end-user is a good starting point before I map out and explore the source code.
I’ve also downloaded free The Magento Certified Developer Plus (pdf) official study guide, which is also offered here (with sign-up) along with other guides. I plan to read through it thoroughly after I’m finished with the user manual.
Finally, I found the free eBook “How to pass Magento Certification Exam in 30 days“. I’m undecided on reading it because my main goal of getting certified this year is to master the platforms I’m studying. I’m less interested in passing the test just for the sake of getting the certification.
I’m also thinking about taking Magento’s front-end certification towards the end of the year. I’m primarily focused on back-end systems, but the additional detail seems like it might be useful at some point.