Which of the following is a characteristic of a FIR (Finite Impulse Response) filter?

A) Can have infinite impulse response

B) Always stable

C) Requires feedback

D) Can implement any frequency response

Answer: B) Always stable

Explanation: FIR filters have a finite number of coefficients and are inherently stable because their output depends only on the current and previous input values. This contrasts with IIR (Infinite Impulse Response) filters, which can potentially be unstable.