What is the brain of the system?

• A. The CPU
• B. The PLC
• C. The GPS unit
• D. The ELX

Answer: (D)

The brain of a system is the part that runs the control software, processes inputs from sensors, and decides what actions to take, coordinating all other components. In this system, that central control role is filled by the ELX. It is the main module that executes the logic, interprets data from inputs, and issues commands to the rest of the system, effectively directing how everything works together. The GPS unit only provides position information and doesn’t control operations. A CPU is a general-purpose processor, and a PLC is a type of controller used in automation; but for this design, the ELX is designated as the core controller, making it the brain of the system.