Question

State whether the differentiator system is causal or not.

(a) True

(b) False

I got this question in an interview for internship.

The query is from Properties of Systems in chapter Signals and Systems Basics of Signals and Systems

Answer 1

The correct option is (b) False

Easiest explanation: The derivative of a function can be written in forward difference and in backward difference form, hence the derivative would depend on a slightly forward value of the function, thus making it non causal.