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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) Overlap add and Overlap save are the two methods for linear FIR filtering a long sequence on a block-by-block basis using DFT.
[A] True
[B] False
Answer: True
(2) In Overlap save method of long sequence filtering, what is the length of the input sequence block?
[A] L+M+1
[B] L+M
[C] L+M-1
[D] None of the mentioned
Answer: L+M-1

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(3) In Overlap save method of long sequence filtering, how many zeros are appended to the impulse response of the FIR filter?
[A] L+M
[B] L
[C] L+1
[D] L-1
Answer: L-1
(4) The first M-1 values of the output sequence in every step of Overlap save method of filtering of long sequence are discarded.
[A] True
[B] False
Answer: True
(5) In Overlap add method, what is the length of the input data block?
[A] L-1
[B] L
[C] L+1
[D] None of the mentioned
Answer: L
(6) Which of the following is true in case of Overlap add method?
[A] M zeros are appended at last of each data block
[B] M zeros are appended at first of each data block
[C] M-1 zeros are appended at last of each data block
[D] M-1 zeros are appended at first of each data block
Answer: M-1 zeros are appended at last of each data block
(7) In which of the following methods, the input sequence is considered as shown in the below diagram?

[A] Overlap save method
[B] Overlap add method
[C] Overlap add & save method
[D] None of the mentioned
Answer: Overlap save method
(8) In which of the following methods, the output sequence is considered as shown in the below diagram?

[A] Overlap save method
[B] Overlap add method
[C] Overlap add & save method
[D] None of the mentioned
Answer: Overlap add method
(9) What is the value of x(n)*h(n), 0≤n≤11 for the sequences x(n)={1,2,0,-3,4,2,-1,1,-2,3,2,1,-3} and h(n)={1,1,1} if we perform using overlap add fast convolution technique?
[A] {1,3,3,1,1,3,5,2,2,2,3,6}
[B] {1,2,0,-3,4,2,-1,1,-2,3,2,1,-3}
[C] {1,2,0,3,4,2,1,1,2,3,2,1,3}
[D] {1,3,3,-1,1,3,5,2,-2,2,3,6}
Answer: {1,3,3,-1,1,3,5,2,-2,2,3,6}
(10) What is the value of x(n)*h(n), 0≤n≤11 for the sequences x(n)={1,2,0,-3,4,2,-1,1,-2,3,2,1,-3} and h(n)={1,1,1} if we perform using overlap save fast convolution technique?
[A] {1,3,3,-1,1,3,5,2,-2,2,3,6}
[B] {1,2,0,-3,4,2,-1,1,-2,3,2,1,-3}
[C] {1,2,0,3,4,2,1,1,2,3,2,1,3}
[D] {1,3,3,1,1,3,5,2,2,2,3,6}
Answer: {1,3,3,-1,1,3,5,2,-2,2,3,6}

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