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Which consequence follows from a failed gateway module?

  • A.Communication with the powertrain only, which is connected directly to the diagnostic socket on every vehicle
  • B.No consequence
  • C.A loss of diagnostic access to every network behind the gateway, together with the loss of cross network functions
  • D.No communication with any module through the socket

Answer: D

The gateway is the single door to the vehicle's networks and its failure closes all of them. The last option adds the loss of cross network functions, which makes it a correct and fuller statement of the same answer. Naming what changes and what stays the same is the reliable route through questions of this shape. Naming the cost of a choice alongside its benefit is what turns a fact into a design decision. Most errors here come from carrying across a result from a neighbouring case where it does not hold.

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