Hi there Jeff,
This sounds like a pretty good thing to me.
As in, NONE of us in this trade knows EVERYTHING about it, sure some may be pretty close, but everyone will have at least one area in which they are weak.
If I were you, I'd be using this opportunity to find out where your weakness is.
A little bit of learning never did any one any harm and it sure as eggs doesn't make you any lesser of an electrician.
One thing I have tried to instill into any apprentice is this, after you get your ticket, don't go throwing out the notes you made from your night school classes until you know all of the material in them.
Is this going to be a full written exam or one of them multi-guess things?
Let's face it, these days if you're not young, you're old - Red Green