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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) What is the output of the single stage lattice filter if x(n) is the input?
[A] x(n)+Kx(n+1)
[B] x(n)+Kx(n-1)
[C] x(n)+Kx(n-1)+Kx(n+1)
[D] Kx(n-1)
Answer: x(n)+Kx(n-1)
(2) What is the output from the second stage lattice filter when two single stage lattice filers are cascaded with an input of x(n)?
[A] K1K2x(n-1)+K2x(n-2)
[B] x(n)+K1x(n-1)
[C] x(n)+K1K2x(n-1)+K2x(n-2)
[D] x(n)+K1(1+K2)x(n-1)+K2x(n-2)
Answer: x(n)+K1(1+K2)x(n-1)+K2x(n-2)
(3) What is the value of the coefficient α2(1) in the case of FIR filter represented in direct form structure with m=2 in terms of K1 and K2?
[A] K1(K2)
[B] K1(1-K2)
[C] K1(1+K2)
[D] None of the mentioned
Answer: K1(1+K2)
(4) The constants K1 and K2 of the lattice structure are called as reflection coefficients.
[A] True
[B] False
Answer: True
(5) If a three stage lattice filter with coefficients K1=1/4, K2=1/2 K3=1/3, then what are the FIR filter coefficients for the direct form structure?
[A] (1,8/24,5/8,1/3)
[B] (1,5/8,13/24,1/3)
[C] (1/4,13/24,5/8,1/3)
[D] (1,13/24,5/8,1/3)
Answer: (1,13/24,5/8,1/3)
(6) What are the lattice coefficients corresponding to the FIR filter with system function H(z)= 1+(13/24)z-1+(5/8)z-2+(1/3)z-3?
[A] (1/2,1/4,1/3)
[B] (1,1/2,1/3)
[C] (1/4,1/2,1/3)
[D] None of the mentioned
Answer: (1/4,1/2,1/3)
(7) If M and N are the orders of numerator and denominator of rational system function respectively, then how many multiplications are required in direct form-I realization of that IIR filter?
[A] M+N-1
[B] M+N
[C] M+N+1
[D] M+N+2
Answer: M+N+1
(8) If M and N are the orders of numerator and denominator of rational system function respectively, then how many additions are required in direct form-I realization of that IIR filter?
[A] M+N-1
[B] M+N
[C] M+N+1
[D] M+N+2
Answer: M+N
(9) If M and N are the orders of numerator and denominator of rational system function respectively, then how many memory locations are required in direct form-I realization of that IIR filter?
[A] M+N+1
[B] M+N
[C] M+N-1
[D] M+N-2
Answer: M+N+1
(10) In direct form-I realization, all-pole system is placed before the all-zero system.
[A] True
[B] False
Answer: False
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