Question

What is bit depth?

(a) Number of quantization level

(b) Interval between two quantization levels

(c) Number of possible digital values to represent each sample

(d) None of the mentioned

This question was posed to me during an interview.

Asked question is from Pulse Code Modulation topic in section Formatting and Baseband Modulation of Digital Communications

Answer 1

Correct answer is (c) Number of possible digital values to represent each sample

To elaborate: One of the properties of PCM signal which determines its stream fidelity is bit depth which is the number of possible digital values that can be used to represent each sample.