# FIR Filters Design Comparison

This set of Digital Signal Processing Question Bank focuses on “Comparison of Design Methods for Linear Phase FIR Filters”.

1. Which of the following is the first method proposed for design of FIR filters?
a) Chebyshev approximation
b) Frequency sampling method
c) Windowing technique
d) None of the mentioned

2. The lack of precise control of cutoff frequencies is a disadvantage of which of the following designs?
a) Window design
b) Chebyshev approximation
c) Frequency sampling
d) None of the mentioned

3. The values of cutoff frequencies in general depend on which of the following?
a) Type of the window
b) Length of the window
c) Type & Length of the window
d) None of the mentioned

4. In frequency sampling method, transition band is a multiple of which of the following?
a) π/M
b) 2π/M
c) π/2M
d) 2πM

5. The frequency sampling design method is attractive when the FIR filter is realized in the frequency domain by means of the DFT.
a) True
b) False

6. Which of the following values can a frequency response take in frequency sampling technique?
a) Zero
b) One
c) Zero or One
d) None of the mentioned

7. Which of the following technique is more preferable for design of linear phase FIR filter?
a) Window design
b) Chebyshev approximation
c) Frequency sampling
d) None of the mentioned

8. By optimal filter design, the maximum side lobe level is minimized.
a) True
b) False

9. Which of the following is the correct expression for transition band Δf?
a) (ωp– ωs)/2π
b) (ωps)/2π
c) (ωps)/2π
d) (ωs– ωp)/2π

10. If the resulting δ exceeds the specified δ2, then the length can be increased until we obtain a side lobe level that meets the specification.
a) True
b) False