Hi,

For the sample test, you can try it many times, once you done the sample test, you can leave the sample test and retake it in N times.

After completing the sample test once, you can leave it by clicking on the You're enrolled button -> Leave The Course.

Now you will be out of this test, and you can join the course again and attend the exam.

This will be applicable only for the SAMPLE TEST, original functional certification exam is once, for each retake you have to make payment again.

Thanks