I think book based knowledge would be sufficient to get through the exam.
Look up Core
Java by Cornell and Horstmann. It deals with AWT (actually Swing) quite in detail.
Remember to go thru the API in detail. U need to know about the constructor for all the components as well as menus, layout managers. Plus their respective methods.
At least go thru following components
Frame, Window, Dialog, Panel, Button, Checkbox, Menu, List, TextField, TextArea
And the Layouts Border, Flow, Gridbag