At the end of the course you'll have a final exam. You must complete this to gain your certificate.
The exam has 65-questions (multiple choice).
You'll need to score over 80% to pass.
You get 4 attempts at the exam.
There's no timer for the exam - just your overall course time limit.
As you get 4 attempts and can revise in between, you should have plenty of opportunity to pass the final exam - so long as you've studied well.
If you fail the more than four times you'll need to re-enroll in the course. To re-enroll you'll need to pay 50% of the amount that you had originally paid when you had enrolled in the course.
When you pass the exam you'll see a final lesson with instructions showing how to access your certificate.