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Which of the following is NOT a usual characteristic of an embedded system?

  • A.tight limits on cost, power and physical size
  • B.a requirement to run unattended for years without a reset
  • C.an expectation that the user will install further software on it
  • D.a real time constraint on how quickly the system is obliged to respond to an event

Answer: C

Users do not add applications to a brake controller, and the software is fixed at manufacture or by a controlled update. Timing constraints, resource limits and long unattended operation are all typical, and the first two often conflict with each other.

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