If you'll be taking an online class, you'll likely be taking an online test. What is it like to take a test online? How are the tests different from ones given in a classroom? One would assume they won't be as difficult since you'll have your textbook and homework in front of you.
The reality is that online tests are just as difficult as in-class tests. Yes, you have your homework and book there for reference, but often times there will be a time limit set for the test. Plus, the instructor will often ask more questions than there is time allotted to look up within the time limit. Of course, you'll have time to look up some answers, but there is also the possibility of essay questions, which require more reflection and critical thinking.
To succeed, you'll have to read the material and prepare just as you would for any test. Make an outline of the chapters, so you can quickly flip to the chapter notes. Overall, many students find online tests easier. However, you'll only do well if you study and prepare just as you would in real life. For more insight into improving your online (and offline) test taking skills, read How to Improve Your Test Taking Skills by McGraw-Hill Staff.
Taking an online class isn't about how easy or hard it is, but, rather, how much you get out of the class.