Digital Signal Processing Multiple Choice Questions and Answers

Questions

1 The lower and upper limits on the convolution sum reflect the causality and finite duration characteristics of the filter.

A True

B False

View Answer

Answer:True

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

View Answer

Answer:±h(M-1-n) n=0,1,2…M-1

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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 z^M+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)

View Answer

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).

A True

B False

View Answer

Answer:True

5 The roots of the equation H(z) must occur in ________________

A Identical

B Zero

C Reciprocal pairs

D Conjugate pairs

View Answer

Answer:Reciprocal pairs

6 If the unit sample response h(n) of the filter is real, complex valued roots need not occur in complex conjugate pairs.

A True

B False

View Answer

Answer:False

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

View Answer

Answer:0

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

View Answer

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

View Answer

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

View Answer

Answer:h(n) anti-symmetric and M odd

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