Digital Signal Processing Multiple Choice Questions and Answers

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

View Answer

Answer:0.5

2 The frequency response H(ω) will be considerably distorted with respect to H(jΩ).

A True

B False

View Answer

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

View Answer

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

View Answer

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

View Answer

Answer:s=(1-z-1)/T

6 Bilinear Transformation is used for transforming an analog filter to a digital filter.

A True

B False

View Answer

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

View Answer

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

View Answer

Answer:Entirely inside the unit circle |z|=1

9 If s=σ+jΩ and z=re^jω, 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

View Answer

Answer:σ < 0

10 If s=σ+jΩ and z=re^jω 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

View Answer

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

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