A little under a year ago, I took the Acquia Certified Developer exam at DrupalCon Austin, and posted Thoughts on the Acquia Drupal Developer Certification Exam. My overall thoughts on the idea of certifications for OSS like Drupal remain unchanged, so go read that previous post to hear them.
I wanted to post a little more about the additional certifications Acquia is now offering; in addition to the initial, more generalist-oriented Acquia Certified Developer Exam, Acquia now offers:
Earlier today, I took the Back End Specialist Exam, which focuses more specifically on things like Drupal's core API, general PHP syntax and style, secure code, content caching, debugging, and interacting with the Drupal community.
Like the other certification exams, you get 90 minutes to complete the exam (60 questions total), and you have to take the exam either online or in a testing center with an active proctor. This time, I elected to take the exam on my own computer, which was a little more annoying than taking the exam in-person at a test center (as I did at DrupalCon last year).