Question

If the output produces nonconvex regions, then how many layered neural is required at minimum?

(a) 2

(b) 3

(c) 4

(d) 5

I had been asked this question during an interview.

The query is from Pattern Classification topic in section Feedforward Neural Networks of Neural Networks

Answer 1

Correct choice is (c) 4

For explanation I would say: Adding one more layer of units to three layer can yield surfaces which can separate even nonconvex regions.