SOLIDWORKS loves to use variables and equations on their exams. Getting used to them is of the utmost importance in order to quickly change information in your models. This allows them more options in testing answers as they can change the variable dimensions given in the written instructions at will and in any combination.
If you read through my post from the CSWP exam on Equations, you will see much the same information is covered. The CSWA is a little easier.
Before starting your exam, I recommend turning on Equations and Sensors. This gives you the option to add each from the design tree and you don't have to go hunting through menus to find them.
Run through this exercise to practice adding Global Variables and Equations. Global Variables and Equations
Make sure you are comfortable with changing the variables and always remember to rebuild your models.
Bryan