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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) What is the range of values called as to which the amplitudes of the output during a limit cycle ae confined to?
[A] Stop band
[B] Pass band
[C] Live band
[D] Dead band
Answer: Dead band
(2) Zero input limit cycles occur from non-zero initial conditions with the input x(n)=0.
[A] True
[B] False
Answer: True

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(3) Which of the following is true when the response of the single pole filter is in the limit cycle?
[A] Actual non-linear system acts as an equivalent non-linear system
[B] Actual non-linear system acts as an equivalent linear system
[C] Actual linear system acts as an equivalent non-linear system
[D] Actual linear system acts as an equivalent linear system
Answer: Actual non-linear system acts as an equivalent linear system
(4) What is the dead band of a single pole filter with a pole at 1/2 and represented by 4 bits?
[A] (-1/2,1/2)
[B] (-1/4,1/4)
[C] (-1/8,1/8)
[D] (-1/16,1/16)
Answer: (-1/16,1/16)
(5) The limit cycle mode with zero input, which occurs as a result of rounding the multiplications, corresponds to an equivalent second order system with poles at z=±1.
[A] True
[B] False
Answer: True
(6) What is the necessary and sufficient condition for a second order filter that no zero-input overflow limit cycles occur?
[A] |a1|+|a2|=1
[B] |a1|+|a2|>1
[C] |a1|+|a2|<1
[D] None of the mentioned
Answer: |a1|+|a2|<1
(7) An effective remedy for curing the problem of overflow oscillations is to modify the adder characteristic.
[A] True
[B] False
Answer: True
(8) What is the dead band of a single pole filter with a pole at 3/4 and represented by 4 bits?
[A] (-1/2,1/2)
[B] (-1/8,1/8)
[C] (-1/4,1/4)
[D] (-1/16,1/16)
Answer: (-1/8,1/8)
(9) The ideal low pass filter cannot be realized in practice.
[A] True
[B] False
Answer: True
(10) The following diagram represents the unit sample response of which of the following filters?

[A] Ideal high pass filter
[B] Ideal low pass filter
[C] Ideal high pass filter at ω=π/4
[D] Ideal low pass filter at ω=π/4
Answer: Ideal low pass filter at ω=π/4

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