Pulse Code Modulation - MCQs with answers

Pulse Code Modulation - MCQs with answers

Q1. The modulation techniques used to convert analog signal into digital signal are

a) Pulse code modulation
b) Delta modulation
c) Adaptive delta modulation
d) All of the above

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Q2. The sequence of operations in which PCM is done is

a) Sampling, quantizing, encoding
b) Quantizing, encoding, sampling
c) Quantizing, sampling, encoding
d) None of the above

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Q3. In PCM, the parameter varied in accordance with the amplitude of the modulating signal is

a) Amplitude
b) Frequency
c) Phase
d) None of the above

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Q4. One of the disadvantages of PCM is

a) It requires large bandwidth
b) Very high noise
c) Cannot be decoded easily
d) All of the above

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Q5. The expression for bandwidth BW of a PCM system, where v is the number of bits per sample and fm is the modulating frequency, is given by

a) BW> = vf_m
b) BW< = vf_m
c) BW> = 2 vf_m
d) BW> = 1/2vf_m

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Q6. The error probability of a PCM is

a) Calculated using noise and inter symbol interference

b) Gaussian noise + error component due to inter symbol interference

c) Calculated using power spectral density

d) All of the above

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