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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 physical device that performs an operation on the signal?
[A] Signal source
[B] System
[C] Medium
[D] None of the mentioned
Answer: System
(2) What is the set of all values of z for which X(z) attains a finite value?
[A] Radius of convergence
[B] Radius of divergence
[C] Feasible solution
[D] None of the mentioned
Answer: Radius of convergence

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(3) What is the ROC of the signal x(n)=δ(n-k), k>0?
[A] z=0
[B] z=∞
[C] Entire z-plane, except at z=0
[D] Entire z-plane, except at z=∞
Answer: Entire z-plane, except at z=0
(4) Which of the following series has an ROC as mentioned below?

[A] α-nu(n)
[B] αnu(n)
[C] α-nu(-n)
[D] αnu(n)
Answer: αnu(n)
(5) What is the ROC of the z-transform of the signal x(n)= anu(n)+bnu(-n-1)?
[A] |a|<|z|<|b|
[B] |a|>|z|>|b|
[C] |a|>|z|<|b|
[D] |a|<|z|>|b|
Answer: |a|<|z|<|b|
(6) What is the ROC of z-transform of finite duration anti-causal sequence?
[A] z=0
[B] z=∞
[C] Entire z-plane, except at z=0
[D] Entire z-plane, except at z=∞
Answer: Entire z-plane, except at z=∞
(7) What is the ROC of z-transform of an two sided infinite sequence?
[A] |z|>r1
[B] |z|< r1
[C] r2<|z|< r1
[D] None of the mentioned
Answer: r2<|z|
(8) What is the ROC of the system function H(z) if the discrete time LTI system is BIBO stable?
[A] Entire z-plane, except at z=0
[B] Entire z-plane, except at z=∞
[C] Contain unit circle
[D] None of the mentioned
Answer: Contain unit circle
(9) The ROC of z-transform of any signal cannot contain poles.
[A] True
[B] False
Answer: True
(10) Is the discrete time LTI system with impulse response h(n)=an(n) (|a| < 1) BIBO stable?
[A] True
[B] False
Answer: True

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