There is a certification discussion forum here, I'm sure there will be plenty of discussion there.
I know exams can be daunting (my first MS exam was). The MS study guides generally do a good job of preparing you.
If you are worried about simulations, make sure you are comfortable with finding your way around the server and database options in the SQL Management Studio.
If there are simulations, you have an advantage, as by definition the visual nature of the test will provide you with visual prompts leading you to the right answer.