The Computing and Information Technology DSST used to be called Introduction to Computing. I think the renaming was a good example of how society has changed in the last 20 years. Many people, especially in the college-going demographic, don't need that same introduction to computing as they used to. This used to be one of the easier exams. If you had a computer at home, or were chained to a desk all day for work, you were probably safe to take this with a minimum of study. The new one is not so straightforward. They've added a lot of breadth to the exam, such as questions about Artificial Intelligence, or telecommunications law. Dedicate some time to studying, especially since what you learn here will also benefit you on the other two computing exams. Make sure you check the foundation exams above. There’s a fair amount of study overlap among these exams, so it’s worth considering taking them close together. Check whether your school allows all the computer related exams to count as separate electives—most do—and it can be an easy way to earn a bunch of credits with a little extra studying.