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Discussion

Which skill does network diagnosis increasingly demand?

  • A.Reading topology drawings and interpreting waveforms
  • B.Mechanical measurement, which remains the principal skill required for the diagnosis of a modern vehicle fault
  • C.Nothing new
  • D.Systematic electrical diagnosis supported by an understanding of how the modules communicate and depend upon each other

Answer: A

Understanding the architecture is now as important as understanding the components. The last option states that requirement more fully, which makes it a correct and broader version of the same answer. The order in which the effects act is what decides the outcome, so it is worth establishing first. A symptom that appears under one condition and not another is what narrows the diagnosis quickly. Naming the cost of a choice alongside its benefit is what turns a fact into a design decision.

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