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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) Which of the following method is used to find the inverse z-transform of a signal?
[A] Counter integration
[B] Expansion into a series of terms
[C] Partial fraction expansion
[D] All of the mentioned
Answer: All of the mentioned
(2)  The z-transform of a signal x(n) whose definition is given by X(z)=\sum_{n=0}^{\infty} x(n)z^{-n} is known as _____________
[A] Unilateral z-transform
[B] Bilateral z-transform
[C] Rational z-transform
[D] None of the mentioned
Answer: Unilateral z-transform
(3) For what kind of signals one sided z-transform is unique?
[A] All signals
[B] Anti-causal signal
[C] Causal signal
[D] None of the mentioned
Answer: Causal signal
(4) What is the one sided z-transform X+(z) of the signal x(n)={1,2,5,7,0,1}?
[A] z2+2z+5+7z-1+z-3
[B] 5+7z+z3
[C] z-2+2z-1+5+7z+z3
[D] 5+7z-1+z-3
Answer: 5+7z-1+z-3
(5) What is the one sided z-transform of x(n)=δ(n-k)?
[A] z-k
[B] zk
[C] 0
[D] 1
Answer: z-k
(6) What is the one sided z-transform of x(n)=δ(n+k)?
[A] z-k
[B] 0
[C] zk
[D] 1
Answer: 0 =0, elsewhere
(7) If all the poles of H(z) are outside the unit circle, then the system is said to be _____________
[A] Only causal
[B] Only BIBO stable
[C] BIBO stable and causal
[D] None of the mentioned
Answer: None of the mentioned
(8)  If pk, k=1,2,…N are the poles of the system and |pk| < 1 for all k, then the natural response of such a system is called as Transient response.
[A] True
[B] False
Answer: True
(9) If all the poles have small magnitudes, then the rate of decay of signal is __________
[A] Slow
[B] Constant
[C] Rapid
[D] None of the mentioned
Answer: Rapid
(10) If one or more poles are located near the unit circle, then the rate of decay of signal is _________
[A] Slow
[B] Constant
[C] Rapid
[D] None of the mentioned
Answer: Slow
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