If you fail the SD Driving Exam, you will not receive your SD Driver's License. You will be able to retake the exam as early as the next day, however, you should not rush retaking it after you have failed. You should pay attention to what your examiner indicates as your weaknesses, and you should work upon improving your driving skills.
Your examiner wants to see that you are capable of driving safely and effectively. During your SD Driving Exam, you want to make sure that you are not driving too quickly or too slowly; you want to accelerate smoothly and gradually. Obey all stop signs and traffic signals, do not tailgate other vehicles and stay in the correct lane. You should also know what various street signs and traffic signals indicate to drivers on the road.