How closely does the DP-600 align with Microsoft practice exam?

I have the DP-600 in a couple of weeks and, as part of preparation, I'm taking Microsoft's practice exam. My question is how closely does the exam align with the practice exam?

For example if you took the practice exam and got a X00 and took the actual and got a similar score, that would be pretty close. But if you were getting 80% on the practice and got a 45% on the actual, that'd be a problem.