What is the default behavior for splitting the training set and test set?

Dataiku will perform a random split and allocate $80\%$ of the data to the training set and $20\%$ to the test set.

Dataiku will order the value using a time column and allocate the first half rows to training set and last half rows to test set.

Dataiku will perform a $5-$fold cross validation.

Dataiku will train on the whole sample available to maximize the training set available and test it on the same sample.