multiclass classification

Question 1

C classes then how many nodes does the last layer have?

Answer 1

C

Question 2

what are the outputs at the last layer?

Answer 2

Probs that the sample belong to each class

Question 3

what is the activation function at the last layer?

Answer 3

softmax

Question 4

formula of softmax at last layer?

Answer 4

e^z where z is the value at the last layer
a at last layer = e^zi/sum(e^zi)
normalize so as to add up to 1

Question 5

C = 2, softmax becomes?

Answer 5

logistic regression