Imagine taking a test wherein your answers will affect thousands of people. You have not been informed of the value of each question (of which there are hundreds), but every point gained or lost could potentially cost thousands of dollars.

You can only prepare for your test with a textbook similar to the one the questions will be drawn from. It will take about three years to get your results: Oh, and the test-givers are paid by someone who will benefit if you happen to lose points on the test.