If you wish, you may have two browser windows open at the same time, one with the test and another with the tutorial. Links to open the tutorial are provided within each test. If your computer locks up or you are disconnected from the Internet, you should be able to go back to the test and do it again, but your previous answers may be gone. If your test is accidentally submitted because of a computer problem, get in touch so we can delete your submission. Don't worry if you don't get a perfect score.
Some questions are intentionally more difficult.
Most people score in the 80-90 range on these tests. Your course instructor is interested in the knowledge you gain from completing the program, not your test scores.