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Statement I: Designers deliberately leave a large margin in bus loading.

Statement II: A heavily loaded bus leaves no room for later modification and becomes latency sensitive.

In the light of the above statements, choose the correct answer.

  • A.Both Statement I and Statement II are correct
  • B.Both Statement I and Statement II are incorrect
  • C.Statement I is correct but Statement II is incorrect
  • D.Statement I is incorrect but Statement II is correct

Answer: A

Correct answer: Both Statement I and Statement II are correct

Both are true and the second gives the reasons. A bus filled close to capacity leaves nothing for the functions added over an aircraft's service life, and modifications are the norm rather than the exception.

It also degrades timing: as loading rises, queueing delays grow and the worst case becomes both larger and harder to bound, which is precisely what certification demands be demonstrated. Designers therefore work to loading targets well below saturation - often around half - treating the unused capacity as a design requirement rather than waste.

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