Is having a training partner mandatory for certification?

Hi everyone
I'm looking forward to learning how to use DVR using the ressources available on the website.
I saw that the form right before taking the online exam asked to select a training partner from a drop-down menu.
So there's my question :
Why is this there and is it mandatory to get certified?
I couldn't find a clear answer so, if someone could confirm this, it would be of great help!
Thanks
I'm looking forward to learning how to use DVR using the ressources available on the website.
I saw that the form right before taking the online exam asked to select a training partner from a drop-down menu.
So there's my question :
Why is this there and is it mandatory to get certified?
I couldn't find a clear answer so, if someone could confirm this, it would be of great help!
Thanks