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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) The linear equations for determining {h(n)} from {H(k+α)} are not simplified.
[A] True
[B] False
Answer: False
(2) The major advantage of designing linear phase FIR filter using frequency sampling method lies in the efficient frequency sampling structure.
[A] True
[B] False
Answer: True
(3) Which of the following is introduced in the frequency sampling realization of the FIR filter?
[A] Poles are more in number on unit circle
[B] Zeros are more in number on the unit circle
[C] Poles and zeros at equally spaced points on the unit circle
[D] None of the mentioned
Answer: Poles and zeros at equally spaced points on the unit circle
(4) In a practical implementation of the frequency sampling realization, quantization effects preclude a perfect cancellation of the poles and zeros.
[A] True
[B] False
Answer: True
(5) In the frequency sampling method for FIR filter design, we specify the desired frequency response Hd(ω) at a set of equally spaced frequencies.
[A] True
[B] False
Answer: True
(6) Why is it desirable to optimize frequency response in the transition band of the filter?
[A] Increase side lobe
[B] Reduce side lobe
[C] Increase main lobe
[D] None of the mentioned
Answer: Reduce side lobe
(7) Which of the following filter design is used in the formulation of design of optimum equi ripple linear phase FIR filter?
[A] Butterworth approximation
[B] Chebyshev approximation
[C] Hamming approximation
[D] None of the mentioned
Answer: Chebyshev approximation
(8) If δ2 represents the ripple in the stop band for a chebyshev filter, then which of the following conditions is true?
[A] 1-δ2 ≤ Hr(ω) ≤ 1+δ2;|ω|≤ωs
[B] 1+δ2 ≤ Hr(ω) ≤ 1-δ2;|ω|≥ωs
[C] δ2 ≤ Hr(ω) ≤ δ2;|ω|≤ωs
[D] -δ2 ≤ Hr(ω) ≤ δ2;|ω|≥ωs
Answer: -δ2 ≤ Hr(ω) ≤ δ2;|ω|≥ωs
(9) If the filter has anti-symmetric unit sample response with M even, then what is the value of Q(ω)?
[A] cos(ω/2)
[B] sin(ω/2)
[C] 1
[D] sinω
Answer: sin(ω/2)
(10) It is convenient to normalize W(ω) to unity in the stop band and set W(ω)=δ2/ δ1 in the pass band.
[A] True
[B] False
Answer: True
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