The exams focus on the skills required to be a successful Node.js developer today. Conducted online, the exams will take two hours each, consisting of performance-based items to be solved on a command line. Candidates will purchase, schedule, and sit for each exam separately, and receive an independent and verifiable certification based upon the exams they pass. Candidates may choose to take either the OpenJS Node.js Services Developer exam, the OpenJS Node.js Application developer exam, or both.
Head on over to the OpenJS Foundation for more information on how to become certified.
You can find the answers to Frequently Asked Questions here.