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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 odd part of a signal x(t) is?
[A] x(t)+x(-t)
[B] x(t)-x(-t)
[C] (1/2)*(x(t)+x(-t))
[D] (1/2)*(x(t)-x(-t))
Answer: (1/2)*(x(t)-x(-t))
(2) Time scaling operation is also known as ___________
[A] Down-sampling
[B] Up-sampling
[C] Sampling
[D] None of the mentioned
Answer: Down-sampling
(3) What is the condition for a signal x(n)=Brn where r=eαT to be called as an decaying exponential signal?
[A] 0 < r < ∞
[B] 0< r <1
[C] r>1
[D] r<0
Answer: 0
(4) The function given by the equation x(n)=1, for n=0; x(n)=0, for n≠0 is a _____________
[A] Step function
[B] Ramp function
[C] Triangular function
[D] Impulse function
Answer: Impulse function
(5) The output signal when a signal x(n)=(0,1,2,3) is processed through an ‘Identical’ system is?
[A] (3,2,1,0)
[B] (1,2,3,0)
[C] (0,1,2,3)
[D] None of the mentioned
Answer: (0,1,2,3)
(6) If a signal x(n) is passed through a system to get an output signal of y(n)=x(n+1), then the signal is said to be ____________
[A] Delayed
[B] Advanced
[C] No operation
[D] None of the mentioned
Answer: None of the mentioned
(7) The output signal when a signal x(n)=(0,1,2,3) is processed through an ‘Delay’ system is?
[A] (3,2,1,0)
[B] (1,2,3,0)
[C] (0,1,2,3)
[D] None of the mentioned
Answer: (1,2,3,0)
(8) The system described by the input-output equation y(n)=nx(n)+bx3(n) is a __________
[A] Static system
[B] Dynamic system
[C] Identical system
[D] None of the mentioned
Answer: Static system
(9) Whether the system described by the input-output equations y(n)=x(n)-x(n-1) a Time-variant system.
[A] True
[B] False
Answer: False
(10) The system described by the input-output equations y(n)=x2(n) is a Non-linear system.
[A] True
[B] False
Answer: True
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