What is a common violation related to starting an exercise before the signal?

A common violation associated with starting an exercise before the official signal is indeed categorized under general deduction. In gymnastics, each routine begins with a clear signal indicating the start, typically given by the judge or a designated official. If the gymnast begins their performance prior to this signal, it shows a lack of adherence to the established procedure, which warrants a penalty.

General deduction serves as a broad category that encompasses various infractions, including premature starts. It emphasizes the importance of discipline and order within the sport, as routines must be completed in compliance with the regulations set forth by governing bodies. While the other choices describe specific situations or errors, they do not encapsulate the overall concept of violating the protocol related to the timing of the exercise. Thus, identifying the infraction under the umbrella of general deduction captures the essence of the violation appropriately.