I am not sure about the amount of time. I don't think there is a time limit. It's possible to pause the exam and resume another day. If you fail you can redo the exam. I think you would have to pay again.
Additionally to the answer Robert has given you.
Mayby also interestingto know is that you will get 5 categories (based on the material given in the introduction course) with each 10 questions, so 50 multiple choice questions.
And no, there is no time limit you can stop/resume your test as long and as much as you like.
The Mendix Rapid Developer certification exam consists of 50 multiple choice questions.
The most confusing I found the security part in my opinion this is not well coverd in the training I would advise to also read the documentation on this https://www.mendix.com/blog/fundamentals-mendix-app-security/.
Go to http://gettingstarted.mendixcloud.com/ and follow the Mendix Introduction course. The questions on the exam will be multiple choice and based on the material given in that course. To pass the test, your overal score should be above 75%. Per category a score of at least 60% is required.
Thank u so much for your answer. R you Mendix Rapid Developer certified?