Digital Signal Processing Questions and Answers | Digital Signal Processing MCQs

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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

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

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

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

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

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

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

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

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

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)

Answer:H*(M-k-α)

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