For this sample, each correct answer is worth 2 points, and the second-best answer is worth 1 point. If so, you can jump to material directly related to the question content which you can review to solidify your understanding. If the button is blank, as it is on the first question, there is no link. You do NOT have to do the questions in order, and for this test, there is no point penalty for using the hint, so you should use it. The program itself has detailed instructions and comments which you can see by asking your browser to reveal the source code of this page.
Students can see all the questions at once and can answer the questions in any order they wish.
I have set up the program so that students can't go to the links until they have answered the question. I have done that for the pedagogical reason that if I don't, students won't bother to read the material before taking the test. They will just take the test and read the parts of the material that the test sends them to. But if you want to take that requirement out, you can.