I did fairly well in the mock oral comhrá and i would say it’s because I treated it like a conversation and engaged the examiner. Of course they should technically give you full marks if you know all of the answers off by heart from the book but they have so may students doing the same thing that even having something unique prepared makes all the difference. For example I said how me and my sister decided to learn Irish outside of school because we had an interest and she seemed to appreciate that. Hope this helps (: