Question

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

I got this question in a job interview.

The origin of the question is Comparison of Design Methods for Linear Phase FIR Filters topic in section Digital Filters Design of Digital Signal Processing

Answer 1

Correct answer is (a) Window design

The best explanation: The major disadvantage of the window design method is the lack of precise control of the critical frequencies.