Question

A signal is anti-causal if ______________

(a) x(t) = 0 for t = 0

(b) x(t) = 1 for t < 0

(c) x(t) = 1 for t > 0

(d) x(t) = 0 for t > 0

This question was posed to me in class test.

The question is from Signal Classification and Properties topic in portion Signals and Systems Basics of Signals and Systems

Answer 1

Right choice is (d) x(t) = 0 for t > 0

For explanation: A signal is said to be anti-causal when x(t) = 0 for t > 0.