I'm told that it's a common dream; finding oneself in the middle of a test, without any preparations.
I've had this dream a few times. What's odd is that it's only occurred in the last year.
Why is that odd? Because I completed my MS over a year ago. What else is odd about it? When it's happened, it's been about an even split between happening at my grad school or at my high school. Undergrad? Hasn't happened yet.
What to make of it? I've no idea; just thought it was interesting.