Digital Signal Processing Questions and Answers | Digital Signal Processing MCQs

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Questions
1 Which of the following defines the rectangular window function of length M-1?
A 
w(n)=1, n=0,1,2...M-1
    =0, else where
B 
w(n)=1, n=0,1,2...M-1
    =-1, else where
C 
w(n)=0, n=0,1,2...M-1
    =1, else where
D None of the mentioned

Answer:
w(n)=1, n=0,1,2...M-1
    =0, else where
2 The multiplication of the window function w(n) with h(n) is equivalent to the multiplication of H(w) and W(w).
A True
B False

Answer:False
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3 What is the width of the main lobe of the frequency response of a rectangular window of length M-1?
A π/M
B 2π/M
C 4π/M
D 8π/M

Answer:4π/M
4 The width of each side lobes decreases with an increase in M.
A True
B False

Answer:True
5 With an increase in the value of M, the height of each side lobe ____________
A Do not vary
B Does not depend on value of M
C Decreases
D Increases

Answer:Increases
6 As M is increased, W(ω) becomes wider and the smoothening produced by the W(ω) is increased.
A True
B False

Answer:False
7 The width of each side lobes decreases with an decrease in M.
A True
B False

Answer:False
8 What is the approximate transition width of main lobe of a Hamming window?
A 4π/M
B 8π/M
C 12π/M
D 2π/M

Answer:8π/M
9 What is the peak side lobe (in dB) for a rectangular window?
A -13
B -27
C -32
D -58

Answer:-13
10 What is the peak side lobe (in dB) for a Hanning window?
A -13
B -27
C -32
D -58

Answer:-32

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