Question

To avoid losing information from periodic objects we need

(a) Sampling frequency twice

(b) Nyquist sampling frequency

(c) Both a or b

(d) Neither a nor b

This question was posed to me in an interview.

I'd like to ask this question from Anti Aliasing in division Animations and Realism of Computer Graphics

Answer 1

The correct answer is (c) Both a or b

For explanation I would say: Because nyquist sampling frequency means sampling frequency twice.