If you fail your IL Driving Exam, you will be able to take it again in 7 days. You are able to take the Driving Exam up to three times in a one year period before you will have to extend your IL Learner's Permit. Don't rush retaking your exam. Listen to what your examiner has identified as your weaknesses and work upon improving those skills before you take your Driving Exam again.
Your examiner wants to see that you are capable of driving safely and effectively. During your IL Driving Exam, you want to make sure that you are not driving too quickly or too slowly; you want to accelerate smoothly and gradually, and you should keep your hands on the wheel at all times. Obey all stop signs and traffic signals, do not tailgate other vehicles and stay in the correct lane. You do not want to slam your brakes suddenly.
You should avoid driving dangerously, driving too quickly, hitting other objects, forgetting to signal, rolling stops, parking incorrectly and not listening to your examiner. Always maintain good posture and signal well in advance.