Question

The multi-grid approach is a ___________ process.

(a) direct

(b) iterative

(c) cyclic

(d) periodic

This question was addressed to me in an internship interview.

This intriguing question originated from Numerical Methods in chapter Numerical Methods of Computational Fluid Dynamics

Answer 1

The correct answer is (c) cyclic

For explanation I would say: The multi-grid approach involves traversal from a fine grid into a coarse one in order to make the error considerable and again another traversal from a coarse grid into a fine one after the error correction.