Newly created DB got Cassandra's level 10 challenge...

does that mean he'll eventually be able to get a ring?
Or is his job now a regular Beginner even though he's earmarked to become a DB at 20, and he won't get the level 30 challenge once he job advances?

Beginners and Rogues are able to get the quest, I mean, if you never advance to DB until 50, it could be possible to get the ring.

From what the nexon Q&A has answered DB's cannot do the ring quest, just thought I should let you know.