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Digital Signal Processing Questions and Answers | Digital Signal Processing MCQs

Free download in PDF Digital Signal Processing Multiple Choice Questions and Answers for competitive exams. These short objective type questions with answers are very important for Board exams as well as competitive exams like UPSC, NDA, SSC etc. These short solved questions or quizzes are provided by Gkseries./p>

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(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
(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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