Digital Signal Processing Multiple Choice Questions and Answers

Questions

1 How does the frequency of oscillations in the pass band of a low pass filter varies with the value of M?

A Decrease with increase in M

B Increase with increase in M

C Remains constant with increase in M

D None of the mentioned

View Answer

Answer:Increase with increase in M

2 The oscillatory behavior near the band edge of the low pass filter is known as Gibbs phenomenon.

A True

B False

View Answer

Answer:True

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3 Which of the following window is used in the design of a low pass filter to have a frequency response as shown in the figure?

Digital Signal Processing

A Hamming window

B Hanning window

C Kaiser window

D Blackman window

View Answer

Answer:Blackman window

4 Which of the following window is used in the design of a low pass filter to have a frequency response as shown in the figure?

Digital Signal Processing

A Hamming window

B Hanning window

C Kaiser window

D Blackman window

View Answer

Answer:Kaiser window

5 What is the approximate transition width of main lobe of a Blackman window?

A 4π/M

B 8π/M

C 12π/M

D 2π/M

View Answer

Answer:12π/M

6 If the value of M increases then the main lobe in the frequency response of the rectangular window becomes broader.

A True

B False

View Answer

Answer:False

7 The large side lobes of W(ω) results in which of the following undesirable effects?

A Circling effects

B Broadening effects

C Ringing effects

D None of the mentioned

View Answer

Answer:Ringing effects

8 In the frequency sampling method for FIR filter design, we specify the desired frequency response Hd(ω) at a set of equally spaced frequencies.

A True

B False

View Answer

Answer:True

9 To reduce side lobes, in which region of the filter the frequency specifications have to be optimized?

A Stop band

B Pass band

C Transition band

D None of the mentioned

View Answer

Answer:Transition band

10 Which of the following is equal to the value of H(k+α)?

A H*(M-k+α)

B H*(M+k+α)

C H*(M+k-α)

D H*(M-k-α)

View Answer

Answer:H*(M-k-α)

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