Exam-style question
Try this first
Regarding bandwidth usage, which statement is correct?.
- A.Digital signals can be compressed to use less bandwidth than analogue signals
- B.Analogue signals always require less bandwidth than digital signals
- C.Digital signals always require more bandwidth than analogue signals
- D.Bandwidth is irrelevant for both
Model answer
What a good answer should say
- Digital signals can be compressed to use less bandwidth than analogue signals
Explanation
Why this works
Define both: Analogue signals transmit continuous waveforms directly, requiring a wide frequency range. Digital signals represent data in bits, which can be compressed.
The key difference is that compression reduces the bandwidth needed for digital signals. Digital systems can therefore transmit the same information over a narrower channel than analogue.
Hence the correct option reflects this qualitative advantage.
Common mistake
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