Practice Tricky Digital Communications Multiple Choice Questions with Answers Quiz-1

Q.1.

Uniform quantizer is also known as

a) Low rise type
b) Mid rise type
c) High rise type
d) None of the mentioned

Explanation

Q.2.

The SNR value can be increased by _____ the number of levels.

a) Increasing
b) Decreasing
c) Does not depend on
d) None of the mentioned

Explanation

Q.3.

Prediction gain _____ for better prediction.

a) Increases
b) Decreases
c) Remains same
d) None of the mentioned

Explanation

Q.4.

Delta modulation is

a) 1 bit DPCM
b) 2 bit DPCM
c) 4 bit DPCM
d) None of the mentioned

Explanation

Q.5.

1 bit quantizer is a

a) Hard limiter
b) Two level comparator
c) Hard limiter & Two level comparator
d) None of the mentioned

Explanation

Q.6.

If step size is increased _____ occurs.

a) Slope overload distortion
b) Granular noise
c) Slope overload distortion & Granular noise
d) None of the mentioned

Explanation

Q.7.

Which helps in maintaining the step size?

a) Delta modulation
b) PCM
c) DPCM
d) Adaptive delta modulation

Explanation

Q.8.

The low pass filter at the output end of delta modulator depends on

a) Step size
b) Quantization noise
c) Bandwidth
d) None of the mentioned

Explanation

Q.9.

In early late timing error detection method if the bit is constant, then the slope will be

a) Close to zero
b) Close to infinity
c) Close to origin
d) None of the mentioned

Explanation

Q.10.

The theoretical gain in zero crossing TED is greater than early late TED.

a) True
b) False

Explanation

Q.11.

Non uniform quantizer ______ distortion.

a) Increases
b) Decreases
c) Does not effect
d) None of the mentioned

Explanation

Q.12.

Vector quantization is used in

a) Audio coding
b) Video coding
c) Speech coding
d) All of the mentioned

Explanation

Q.13.

The spectral density of white noise is

a) Exponential
b) Uniform
c) Poisson
d) Gaussian

Explanation

Q.14.

The probability density function of the envelope of narrow band noise is

a) Uniform
b) Gaussian
c) Rayleigh
d) Rician

Explanation

Q.15.

The type of noise that interferes much with high frequency transmission is

a) White
b) Flicker
c) Transit time
d) Shot

Explanation

Q.16.

Thermal noise power of a resistor depends upon

a) Its resistance value
b) Noise temperature
c) Bandwidth
d) Ambient temperature

Explanation

Support mcqgeeks.com by disabling your adblocker.