Commercial pilot training in the USA has more advantages; you will get in your self-confidence. You will learn to fly an aircraft from expert instructors, and it will also boost your confidence and skills to become a professional pilot. When you get training to fly a plane, then the instructor will first provide you ample information about several parts of the cockpit and then give you coaching for the runway rules and then start coaching for flying the airplane under strict supervision. Regular training for operating aircraft will polish your skills and make you capable of obtaining commercial pilot license requirements.
Towards the end of the course of PPL(A), IR(A) and CPL(A) you will have to demonstrate a sufficient level of theoretical knowledge at an FAA approved testing center in the form of a written test. To pass the written examinations you need to achieve a score of at least 70%, which is still a passing score. This test must be done before the Check Ride.