Question

If hd(n) is the unit sample response of an ideal differentiator, then what is the value of hd(0)?

(a) 1

(b) -1

(c) 0

(d) 0.5

I had been asked this question in an internship interview.

This key question is from Design of FIR Differentiators in section Digital Filters Design of Digital Signal Processing

Answer 1

Right answer is (c) 0

Best explanation: Since we know that the unit sample response of an ideal differentiator is anti-symmetric,

=>hd(0)=0.