In order to receive credit for the course, you will have to complete all required tests in each module. If you start a test but do not submit it, you can return to the page later and pick up where you left off. There are two types of tests: essay and multiple choice.
Multiple Choice - Tests consist of questions with up to four possible answers. Your score will be calculated automatically when the test is submitted based on the number you answer correctly. Some tests can only be taken once, but some tests can be retaken repeatedly. If your instructor allows retakes on that test, your newest score will always replace your older score, even if you score lower.
Essay - Your work will be saved so you don't have to complete the test in one sitting, but you must submit your answers eventually in order to receive credit for the essay. After submitting, you will still be able to edit your answer up until the point that the instructor grades the test. Some instructors do not grade essays until the end of the course, so your essay may not be graded right away, but you will still receive credit as long as you've submitted the test.