Exam-style question
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Which is a qualitative advantage of digital over analogue in data transmission?.
- A.Digital signals can be regenerated without loss of quality
- B.Analogue signals can be regenerated without loss of quality
- C.Digital signals cannot be amplified
- D.Analogue signals are always more secure
Model answer
What a good answer should say
- Digital signals can be regenerated without loss of quality
Explanation
Why this works
Define both: Analogue signals degrade each time they are amplified or regenerated, leading to cumulative noise. Digital signals can be regenerated by converting to a clean digital representation and back, eliminating accumulated errors.
The key difference is regeneration fidelity. Digital’s ability to be regenerated cleanly is the qualitative advantage highlighted by the correct option.
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