Exams will be closed-book. You will be allowed one hand-written "cheat sheet" of size 8.5in x 5.5in. No other aid will be allowed, except for the writing utensil.
A copy of an old sample test can be found here.
Disclaimer: Tests during this semester may or may not be similar to the given sample test. Good performance on sample-test questions provides no guarantee that you will do well in the actual exam.