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Digital Signal Processing Questions and Answers | Digital Signal Processing MCQs

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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) How does the frequency of oscillations in the pass band of a low pass filter varies with the value of M?
[A] Decrease with increase in M
[B] Increase with increase in M
[C] Remains constant with increase in M
[D] None of the mentioned
Answer: Increase with increase in M
(2) The oscillatory behavior near the band edge of the low pass filter is known as Gibbs phenomenon.
[A] True
[B] False
Answer: True

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(3) Which of the following window is used in the design of a low pass filter to have a frequency response as shown in the figure?

[A] Hamming window
[B] Hanning window
[C] Kaiser window
[D] Blackman window
Answer: Blackman window
(4) Which of the following window is used in the design of a low pass filter to have a frequency response as shown in the figure?

[A] Hamming window
[B] Hanning window
[C] Kaiser window
[D] Blackman window
Answer: Kaiser window
(5) What is the approximate transition width of main lobe of a Blackman window?
[A] 4π/M
[B] 8π/M
[C] 12π/M
[D] 2π/M
Answer: 12π/M
(6) If the value of M increases then the main lobe in the frequency response of the rectangular window becomes broader.
[A] True
[B] False
Answer: False
(7) The large side lobes of W(ω) results in which of the following undesirable effects?
[A] Circling effects
[B] Broadening effects
[C] Ringing effects
[D] None of the mentioned
Answer: Ringing effects
(8) 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
(9) To reduce side lobes, in which region of the filter the frequency specifications have to be optimized?
[A] Stop band
[B] Pass band
[C] Transition band
[D] None of the mentioned
Answer: Transition band
(10) Which of the following is equal to the value of H(k+α)?
[A] H*(M-k+α)
[B] H*(M+k+α)
[C] H*(M+k-α)
[D] H*(M-k-α)
Answer: H*(M-k-α)

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