HDPCD spark certification

[#1]

I am planning to give HDPCD spark certification. Few question abt. it –

1. Do they specify in question that it has the be solved using RDD or Data frames or do we have a choice?
2. Is there any IDE available in exam env?
3. Can someone share the format to questions?
4. Is there any practice exam available, if not any other way we can get a feel to exam env.
5. Any tips for exam or preparation itself

Thanks in Advance