Who is right when Technician A says some ASE questions cover the operation of various automotive systems, and Technician B says they cover the repair of those systems?

Both Technician A and Technician B are correct because the ASE certification tests encompass a comprehensive understanding of automotive systems, which includes both their operation and repair.

Technician A's statement about some ASE questions covering the operation of various automotive systems highlights the importance of understanding how these systems function. This knowledge is crucial for diagnosing issues, as an understanding of the system's operation allows technicians to identify what might be going wrong.

On the other hand, Technician B emphasizes the repair aspect, which is equally vital in the context of ASE certification. Questions that focus on the repair of automotive systems assess a candidate's ability to apply their knowledge practically, which is essential for the successful maintenance and servicing of vehicles.

Together, both aspects—operation and repair—create a holistic approach to automotive technician education and evaluation, ensuring that certified technicians are well-equipped to handle both understanding and fixing any issues they may encounter. Thus, the correct answer is that both statements are accurate, reflecting the dual focus of the ASE certification process.