Digital Signal Processing Questions and Answers | Digital Signal Processing MCQs

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Questions
1 What is the radius of the circle represented by the image of jΩ axis of the s-domain?
A 0.75
B 0.25
C 1
D 0.5

Answer:0.5
2 The frequency response H(ω) will be considerably distorted with respect to H(jΩ).
A True
B False

Answer:True
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3 The left half of the s-plane is mapped to which of the following in the z-domain?
A Outside the circle |z-0.5|=0.5
B Outside the circle |z+0.5|=0.5
C Inside the circle |z-0.5|=0.5
D Inside the circle |z+0.5|=0.5

Answer:Inside the circle |z-0.5|=0.5
4 An analog high pass filter can be mapped to a digital high pass filter.
A True
B False

Answer:False
5 Which of the following is the correct relation between ‘s’ and ‘z’?
A s=(1-z-1)/T
B s=1/(1+zT)
C s=(1+z-1)/T
D none of the mentioned

Answer:s=(1-z-1)/T
6 Bilinear Transformation is used for transforming an analog filter to a digital filter.
A True
B False

Answer:True
7 Which of the following rule is used in the bilinear transformation?
A Simpson’s rule
B Backward difference
C Forward difference
D Trapezoidal rule

Answer:Trapezoidal rule
8 In bilinear transformation, the left-half s-plane is mapped to which of the following in the z-domain?
A Entirely outside the unit circle |z|=1
B Partially outside the unit circle |z|=1
C Partially inside the unit circle |z|=1
D Entirely inside the unit circle |z|=1

Answer:Entirely inside the unit circle |z|=1
9 If s=σ+jΩ and z=rejω, then what is the condition on σ if r<1?Which of the following is the correct relation between ‘s’ and ‘z’?
A σ > 0
B σ < 0
C σ > 1
D σ < 1

Answer:σ < 0
10 If s=σ+jΩ and z=rejω and r=1, then which of the following inference is correct?
A LHS of the s-plane is mapped inside the circle, |z|=1
B RHS of the s-plane is mapped outside the circle, |z|=1
C Imaginary axis in the s-plane is mapped to the circle, |z|=1
D None of the mentioned

Answer:Imaginary axis in the s-plane is mapped to the circle, |z|=1

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