Question

What is unsupervised learning?

(a) features of group explicitly stated

(b) number of groups may be known

(c) neither feature & nor number of groups is known

(d) none of the mentioned

This question was posed to me in unit test.

My doubt stems from Introduction in portion Introduction of Neural Networks

Answer 1

The correct option is (c) neither feature & nor number of groups is known

The explanation is: Basic definition of unsupervised learning.