MicrosoftThe problem in design for certification exams is to think about the type of equipment the person will use. It's not just about exam center desktops and monitor , but the person can take exams at home and for example, the person can use a 13-inch laptop/MacOS. Does the UX design support everything without deformatting or hiding something that the person will spend precise minutes.
Important topic question that many UX designers don't think is what design will do psychologically to the person.
For example, a list of visible questions with visible time can be highly stressing for a person, causing them to be unable to take the exam. For this reason there must be usability tests with different people regardless of culture, language, etc.
Another example that UX can fail. The design must be inclusive, meaning a person who cannot see must be able to take the exam and use software that reads for them. The more components the design have, the more problematic it will be.
I've seen situations where software fails because it wasn't adapted for all types of people.
I understand that a design and redesign certification is quite complicated.
sjorspaI'm not complaining about your design. I'm just giving my opinion 
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