You will do the FEAST in the am and if you pass you'll do the DART in the pm. As 'GoldenHead' said; there's information online on what it will contain if you do some research, and even tests (or portions of the test rather) that are in some way similar - but not as the actual test as a whole.
You can prepare yourself to some degree, but it really comes down to you personally if you have the capabilities or not.