.fit() in sklearn package

Course Q&A Machine Learning Specialization Supervised ML: Regression and Classification
1

In any of the sklearn packages where you fit the X_train and y_train data to the model, does it compute the gradient, use the cost function, then use gradient and cost function to compute gradient descent to find the local minimum?

2

Not everyone.

I believe this one should work in that way as you can tell by its name.

Cheers,
Raymond

3

that makes sense, thank you so much!