You will have a tenure of 1 month for attempting the exam after the registrations,
If you haven’t attempted the exam, you can use the invitation link sent to your email to attempt the exam in that 1 month's time,
However, if you have already attempted the exam, you cannot attempt it again.
And, if you are facing issues to attempt the exam, you can mail your issues to email@example.com
Let me know, if you still have queries,
Hope it helps!
No, You can't re attempt the exam. To appear for exam you need to pay again for registration.