Final answer:
The statement about a device used to measure computer system operating voltages and interpret on-board trouble codes is true when referring to multimeters or digital voltmeters. Null measurements are a more precise but complex alternative.
Step-by-step explanation:
A(n) multimeter or a digital voltmeter (DVM) is often used to measure computer system operating voltages and interpret on-board trouble codes. This statement can be considered true as multimeters and DVMs are essential tools for diagnosing electrical issues in various systems, including computers. These devices can measure voltage, current, and resistance, and advanced models often come with features that help in diagnosing errors, such as interpreting trouble codes in automotive and other complex electronic systems.
However, in the context of precision measurements and eliminating the influence of the measuring device on the circuit, null measurements are a more accurate but complex method. These measurements use digital meters that employ solid-state electronics and can achieve very high accuracies, which is critical in maintaining system stability and performance.