EX200 is the first RHEL certification, so required knowledge is broad enough to cover both RH124 and RH134, or RH199 if you only need a quick review of topics you already know to get up to speed.
As per the Exam description (https://www.redhat.com/en/services/training/ex200-red-hat-certified-system-administrator-rhcsa-exam) :
Prerequisites for this exam
* Have either taken Red Hat System Administration I (RH124) and Red Hat System Administration II (RH134) or the RHCSA Rapid Track course (RH199) that combines those courses, ****or have comparable work experience**** as a system administrator on Red Hat Enterprise Linux
* Review the Red Hat Certified System Administrator exam (EX200) objectives
Take our free assessment to find the course that best supports your preparation for this exam.
You can also review the course objectives for RH124 and RH134, as well as the exam objectives to get an idea of the topics covered in the exam.
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