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Of the following which is the preferred modulation scheme for digital communication?

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in Physics – Class 12 by (135k points)
Of the following which is the preferred modulation scheme for digital communication?

(a) Pulse code modulation

(b) Pulse amplitude modulation

(c) Pulse position modulation

(d) Pulse width modulation

I had been asked this question in a job interview.

This key question is from Communication Systems topic in chapter Communication Systems of Physics – Class 12

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Right answer is (a) Pulse code modulation

The explanation is: Pulse code modulation is the one preferred for digital communication. Pulse codes are used to convert an analog signal to a digital one. It is the standard form of digital audio in computers, compact discs, etc.

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