This set of Digital Communications Multiple Choice Questions & Answers (MCQs) focuses on “Random processes”.
1. Which method is much better and efficient?
a) Vector quantization
b) Scalar quantization
c) Vector & Scalar quantization
d) None of the mentioned
View Answer
Explanation: Vector quantization will always equal or exceed the performance of scalar quantization.
2. Analog source coding method are
a) Temporal waveform coding
b) Spectral waveform coding
c) Model based coding
d) All of the mentioned
View Answer
Explanation: Three types of analog source coding methods are temporal waveform coding, spectral waveform coding and model based coding.
3. The source output in PCM and DPCM is quasi stationary.
a) True
b) False
View Answer
Explanation: The source output of PCM and DPCM and stationary in nature.
4. Which reduces the dynamic range of quantization noise in PCM?
a) Non uniform quantizer
b) Uniform quantizer
c) Adaptive quantizer
d) None of the mentioned
View Answer
Explanation: Adaptive quantizer reduces the dynamic range of quantization noise in PCM and DPCM.
5. The type of distortion which occurs in delta modulation is
a) Slope overload distortion
b) Granular noise
c) Slope overload distortion & Granular noise
d) None of the mentioned
View Answer
Explanation: The two types of distortion that occurs in delta modulation are slope overload distortion and granular noise.
6. Binomial distribution deals with
a) Continuous random variable
b) Discrete random variable
c) Continuous & Discrete random variable
d) None of the mentioned
View Answer
Explanation: Binomial distribution deals with discrete random variable.
7. In poisson distribution mean is ______ variance.
a) Greater than
b) Lesser than
c) Equal to
d) Does not depend on
View Answer
Explanation: In poisson distribution, variance is nearly same or equal to mean of the distribution.
8. Stochastic process are
a) Random in nature
b) Are function of time
c) Random in nature and are a function of time
d) None of the mentioned
View Answer
Explanation: Stochastic process are random in nature and are a function of time.
9. Stochastic processes are
a) Strict sense stationary process
b) Wide sense stationary process
c) All of the mentioned
d) None of the mentioned
View Answer
Explanation: Stochastic process is a wide sense stationary process.
10. Gaussian process is a
a) Wide sense stationary process
b) Strict sense stationary process
c) All of the mentioned
d) None of the mentioned
View Answer
Explanation: If Gaussian process is a wide sense stationary process then it will also be strict sense stationary process.
Sanfoundry Global Education & Learning Series – Digital Communications.
To practice all areas of Digital Communications, here is complete set of 1000+ Multiple Choice Questions and Answers.
If you find a mistake in question / option / answer, kindly take a screenshot and email to [email protected]
