Question

PCM word size can be described by

(a) Time period

(b) Symbol rate

(c) Number of quantization levels

(d) None of the mentioned

The question was posed to me during a job interview.

This interesting question is from Baseband Transmission-2 topic in division Formatting and Baseband Modulation of Digital Communications

Answer 1

Right option is (c) Number of quantization levels

For explanation: Each analog sample is transformed into PCM word made up of a group of bits. The PCM word size can be described by number of quantization levels allowed for each sample.