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Field update capability is designed in from the start because

  • A.the firmware cannot otherwise be programmed at the time of manufacture
  • B.certification bodies require every product to be updatable
  • C.the bootloader is smaller than the application
  • D.a defect found after shipping is otherwise very expensive to correct

Answer: D

Recalling units or visiting sites costs orders of magnitude more than an update over the product's own interface. Retrofitting the capability afterwards is often impossible, since the flash layout and the loader have to be planned for.

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