[Timothy Teoh]

Possibly, perhaps some more specific wording around the use case would be helpful! I think the thing is that having gone through the Firehose FAQs, the point about needing custom prefixes for partitioning stood out, so that appeared to be what was being tested.

Just sat the exam and there was also a question about this with YMD partitioning vs device-YMD partitioning, but it called out that the question was on which was more cost effective, so I did choose device-YMD partitioning there!