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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>
(1)
The lower and upper limits on the convolution sum reflect the causality and finite duration characteristics of the filter.
(2)
Which of the following condition should the unit sample response of a FIR filter satisfy to have a linear phase?
[A]
h(M-1-n) n=0,1,2…M-1
[B]
±h(M-1-n) n=0,1,2…M-1
[C]
-h(M-1-n) n=0,1,2…M-1
[D]
None of the mentioned
Answer: ±h(M-1-n) n=0,1,2…M-1
(3)
If H(z) is the z-transform of the impulse response of an FIR filter, then which of the following relation is true?
[A]
zM+1.H(z-1)=±H(z)
[B]
z-(M+1).H(z-1)=±H(z)
[C]
z(M-1).H(z-1)=±H(z)
[D]
z-(M-1).H(z-1)=±H(z)
Answer: z-(M-1).H(z-1)=±H(z)
(4)
The roots of the polynomial H(z) are identical to the roots of the polynomial H(z-1).
(5)
The roots of the equation H(z) must occur in ________________
[A]
Identical
[B]
Zero
[C]
Reciprocal pairs
[D]
Conjugate pairs
(6)
If the unit sample response h(n) of the filter is real, complex valued roots need not occur in complex conjugate pairs.
(7)
What is the value of h(M-1/2) if the unit sample response is anti-symmetric?
[A]
0
[B]
1
[C]
-1
[D]
None of the mentioned
(8)
What is the number of filter coefficients that specify the frequency response for h(n) symmetric?
[A]
(M-1)/2 when M is odd and M/2 when M is even
[B]
(M-1)/2 when M is even and M/2 when M is odd
[C]
(M+1)/2 when M is even and M/2 when M is odd
[D]
(M+1)/2 when M is odd and M/2 when M is even
Answer: (M+1)/2 when M is odd and M/2 when M is even
(9)
What is the number of filter coefficients that specify the frequency response for h(n) anti-symmetric?
[A]
(M-1)/2 when M is even and M/2 when M is odd
[B]
(M-1)/2 when M is odd and M/2 when M is even
[C]
(M+1)/2 when M is even and M/2 when M is odd
[D]
(M+1)/2 when M is odd and M/2 when M is even
Answer: (M-1)/2 when M is odd and M/2 when M is even
(10)
Which of the following is not suitable either as low pass or a high pass filter?
[A]
h(n) symmetric and M odd
[B]
h(n) symmetric and M even
[C]
h(n) anti-symmetric and M odd
[D]
h(n) anti-symmetric and M even
Answer: h(n) anti-symmetric and M odd
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