Exam-style question
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What characterizes a digital signal?.
- A.It can take any value within a range
- B.It is represented by a series of discrete values
- C.It is always continuous
- D.It is less susceptible to noise than analogue signals
Model answer
What a good answer should say
- It is represented by a series of discrete values
Explanation
Why this works
A digital signal is defined as one that is represented by discrete values, as opposed to the continuous nature of analogue signals. This characteristic allows digital signals to be more robust against noise and interference.
Therefore, the key difference is that digital signals use discrete values for representation, making them suitable for modern communication systems.
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