Digital Signal Processing Questions and Answers | Digital Signal Processing MCQs

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Questions
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?

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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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