CodeSignal ML / Research Scientist OA (10-Problem Battery)

Requirements This assessment contains 10 questions combining multiple-choice items with programming exercises: Confusion matrix — select the matrix whose Recall exceeds 90% while its FPR remains below 10%. Ensemble methods — choose all statements that correctly describe situations in which ensembles help or cause drawbacks, including interpretability, training expense, overfitting, and datasets containing both linear and nonlinear relationships. Decision-tree impurity —…