Hana certification exam questions

I just finished taking the Hana (HA310/350/360)bootcamp class a few weeks ago.

How do I go about taking the Hana certification exam?

Is there a cost for taking the Hana certification exam?

Where do you take the exam, is it online?

Is the Hana certification exam all multiple choice questions (how many)? Are there any recommendations or documents on how to prepare for the exam?

Thanks,

Joe