DSST exams are usually multiple choice, timed, and administered at a computer terminal. A score of 70% or better is considered passing and the results are not included in your GPA. If you do not post a score of 70% or better, you do not earn credit for the exam.
If you are considering exams as part of your strategy to complete degree requirements, you need to review the exam list for titles that interest you and that do not overlap in content in an area for which you have already received credit or will receive credit. There are many titles to choose from that will address core (general eds) and titles that will address electives only. You are strongly advised to review all exam titles with your academic advisor before completing an exam especially if you are testing to earn credit in a core (general ed) area.