Exam-style question
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What is the key difference between an analogue signal and a digital signal?.
- A.An analogue signal varies continuously, while a digital signal uses distinct levels
- B.An analogue signal always carries text, while a digital signal always carries images
- C.An analogue signal is data, while a digital signal is a programming language
- D.An analogue signal uses distinct levels, while a digital signal varies continuously
Model answer
What a good answer should say
- An analogue signal varies continuously, while a digital signal uses distinct levels
Explanation
Why this works
The distinction concerns how the signal changes. Analogue signals change continuously; digital signals use separate, distinct levels.
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