MLE CodeSignal OA (MCQ + NN + Classical-ML Coding)

Requirements This is a 70-minute assessment with roughly 10 items. Multi-select ML concepts (6 questions) Trade-offs among calibration, precision, recall, and false positive rate (e.g., “which thresholds achieve recall ≥ X and FPR ≤ Y”). Selecting the appropriate loss function for logistic regression. How to increase bias while simultaneously reducing variance. Key considerations when choosing an ensemble learning method. PCA versus LDA — deciding which technique to apply in…