Modern Standard Arabic, and nothing else
Like every credible Arabic certification, CIMA tests Modern Standard Arabic. If your goal is talking to people in Cairo, Casablanca or Beirut, no major exam certifies that variety, and preparing for MSA will not get you there. MSA is the language of news, administration, literature and formal writing — which is exactly what a reading exam tests, and exactly what a conversation is not.
That is not a criticism of the exam. It is the reason a reading-focused product like ours is a better fit for Arabic certification than for Arabic conversation, and we would rather say so than let you find out after a subscription.