Amazon AWS Certified Machine Learning Engineer - Associate MLA-C01 Exam Dumps, Practice Test Questions

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  • Premium File: 270 Questions & Answers. Last update: Nov 9, 2026
  • Training Course: 244 Video Lectures
  • Study Guide: 548 Pages
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AWS Certified Machine Learning Engineer - Associate MLA-C01 Premium Bundle

Amazon AWS Certified Machine Learning Engineer - Associate MLA-C01 Premium Bundle
  • Premium File: 270 Questions & Answers. Last update: Nov 9, 2026
  • Training Course: 244 Video Lectures
  • Study Guide: 548 Pages
  • Latest Questions
  • 100% Accurate Answers
  • Fast Exam Updates
$79.97
$59.98

Amazon AWS Certified Machine Learning Engineer - Associate MLA-C01 Practice Test 29

Question 280

A team is choosing a specific control for this workload: A warehouse defect classifier misses scratch defects but handles dents accurately, and its overall accuracy does not reveal the category-specific mistake. Which action best addresses the actual requirement?

  1. Reduce overfitting with appropriate depth, regularization, early stopping, or more representative training data.
  2. Analyze which true classes are confused with predicted classes and target those errors.
  3. Instrument the training job and investigate exploding gradients, invalid inputs, and optimizer settings.
  4. Use RMSE for regression comparison when large errors deserve disproportionate weight.

Explanation

Correct Answer

B:

This action fits the situation: A warehouse defect classifier misses scratch defects but handles dents accurately, and its overall accuracy does not reveal the category-specific mistake. It implements the needed technical control: Analyze which true classes are confused with predicted classes and target those errors. The intended outcome is that engineers can identify the specific confused defect types rather than only a global accuracy figure. The important limitation is that a confusion matrix needs trustworthy labels and representative class proportions.

Incorrect Answers

A:

This action is appropriate for another requirement: An XGBoost model achieves near-perfect training accuracy but sharply worse validation accuracy after adding many trees. It does not solve the presented constraint: A warehouse defect classifier misses scratch defects but handles dents accurately, and its overall accuracy does not reveal the category-specific mistake. The matching action for this case is: Analyze which true classes are confused with predicted classes and target those errors.

C:

This action is appropriate for another requirement: An existing SageMaker Debugger customer sees a deep network loss become NaN, with exploding gradient magnitudes suspected on certain batches. It does not solve the presented constraint: A warehouse defect classifier misses scratch defects but handles dents accurately, and its overall accuracy does not reveal the category-specific mistake. The matching action for this case is: Analyze which true classes are confused with predicted classes and target those errors.

D:

This action is appropriate for another requirement: A forecasting system predicts monthly electricity costs, and the business wants large monetary mistakes penalized more strongly than small ones. It does not solve the presented constraint: A warehouse defect classifier misses scratch defects but handles dents accurately, and its overall accuracy does not reveal the category-specific mistake. The matching action for this case is: Analyze which true classes are confused with predicted classes and target those errors.

Question 281

An ML engineering team faces this production constraint: An XGBoost model achieves near-perfect training accuracy but sharply worse validation accuracy after adding many trees. Which action best addresses the actual requirement?

  1. Reduce overfitting with appropriate depth, regularization, early stopping, or more representative training data.
  2. Try more expressive features or a model family with sufficient capacity and reassess both splits.
  3. Compare ROC-AUC on the same labeled evaluation partition.
  4. Analyze which true classes are confused with predicted classes and target those errors.

Explanation

Correct Answer

A:

This action fits the situation: An XGBoost model achieves near-perfect training accuracy but sharply worse validation accuracy after adding many trees. It implements the needed technical control: Reduce overfitting with appropriate depth, regularization, early stopping, or more representative training data. The intended outcome is that the validation gap narrows without merely memorizing training examples. The important limitation is that reducing complexity excessively can turn an overfit model into an underfit one.

Incorrect Answers

B:

This action is appropriate for another requirement: Both training and validation errors remain high for a simple linear model that cannot capture a clear nonlinear relationship. It does not solve the presented constraint: An XGBoost model achieves near-perfect training accuracy but sharply worse validation accuracy after adding many trees. The matching action for this case is: Reduce overfitting with appropriate depth, regularization, early stopping, or more representative training data.

C:

This action is appropriate for another requirement: Two binary models should be compared on relative discrimination across all possible thresholds rather than their accuracy at one arbitrary cutoff. It does not solve the presented constraint: An XGBoost model achieves near-perfect training accuracy but sharply worse validation accuracy after adding many trees. The matching action for this case is: Reduce overfitting with appropriate depth, regularization, early stopping, or more representative training data.

D:

This action is appropriate for another requirement: A warehouse defect classifier misses scratch defects but handles dents accurately, and its overall accuracy does not reveal the category-specific mistake. It does not solve the presented constraint: An XGBoost model achieves near-perfect training accuracy but sharply worse validation accuracy after adding many trees. The matching action for this case is: Reduce overfitting with appropriate depth, regularization, early stopping, or more representative training data.

Question 282

A cloud ML change request describes the following issue: Both training and validation errors remain high for a simple linear model that cannot capture a clear nonlinear relationship. Which action best addresses the actual requirement?

  1. Compare ROC-AUC on the same labeled evaluation partition.
  2. Reduce overfitting with appropriate depth, regularization, early stopping, or more representative training data.
  3. Try more expressive features or a model family with sufficient capacity and reassess both splits.
  4. Evaluate recall and adjust the operating threshold while monitoring false-positive burden.

Explanation

Correct Answer

C:

This action fits the situation: Both training and validation errors remain high for a simple linear model that cannot capture a clear nonlinear relationship. It implements the needed technical control: Try more expressive features or a model family with sufficient capacity and reassess both splits. The intended outcome is that the model can represent the signal that the original baseline systematically missed. The important limitation is that more complex models still require a separate holdout to detect future overfitting.

Incorrect Answers

A:

This action is appropriate for another requirement: Two binary models should be compared on relative discrimination across all possible thresholds rather than their accuracy at one arbitrary cutoff. It does not solve the presented constraint: Both training and validation errors remain high for a simple linear model that cannot capture a clear nonlinear relationship. The matching action for this case is: Try more expressive features or a model family with sufficient capacity and reassess both splits.

B:

This action is appropriate for another requirement: An XGBoost model achieves near-perfect training accuracy but sharply worse validation accuracy after adding many trees. It does not solve the presented constraint: Both training and validation errors remain high for a simple linear model that cannot capture a clear nonlinear relationship. The matching action for this case is: Try more expressive features or a model family with sufficient capacity and reassess both splits.

D:

This action is appropriate for another requirement: A screening classifier is used to find high-risk cases where an undetected positive case carries a substantial cost. It does not solve the presented constraint: Both training and validation errors remain high for a simple linear model that cannot capture a clear nonlinear relationship. The matching action for this case is: Try more expressive features or a model family with sufficient capacity and reassess both splits.

Question 283

A team is choosing a specific control for this workload: A regulated lender with existing SageMaker Clarify access needs feature attributions explaining which inputs influenced individual credit predictions. Which action best addresses the actual requirement?

  1. Use RMSE for regression comparison when large errors deserve disproportionate weight.
  2. Use F1 as a joint precision-and-recall measure for model comparison.
  3. Generate supported Clarify model-explainability reports and review them for stability and reasonableness.
  4. Compare ROC-AUC on the same labeled evaluation partition.

Explanation

Correct Answer

C:

This action fits the situation: A regulated lender with existing SageMaker Clarify access needs feature attributions explaining which inputs influenced individual credit predictions. It implements the needed technical control: Generate supported Clarify model-explainability reports and review them for stability and reasonableness. The intended outcome is that reviewers gain a quantitative view of feature contribution to predictions. The important limitation is that feature attributions are not causal proof; Clarify has not been open to new customers since July 30, 2026.

Incorrect Answers

A:

This action is appropriate for another requirement: A forecasting system predicts monthly electricity costs, and the business wants large monetary mistakes penalized more strongly than small ones. It does not solve the presented constraint: A regulated lender with existing SageMaker Clarify access needs feature attributions explaining which inputs influenced individual credit predictions. The matching action for this case is: Generate supported Clarify model-explainability reports and review them for stability and reasonableness.

B:

This action is appropriate for another requirement: An extremely imbalanced email classifier needs one summary of precision and recall rather than overall accuracy inflated by negative examples. It does not solve the presented constraint: A regulated lender with existing SageMaker Clarify access needs feature attributions explaining which inputs influenced individual credit predictions. The matching action for this case is: Generate supported Clarify model-explainability reports and review them for stability and reasonableness.

D:

This action is appropriate for another requirement: Two binary models should be compared on relative discrimination across all possible thresholds rather than their accuracy at one arbitrary cutoff. It does not solve the presented constraint: A regulated lender with existing SageMaker Clarify access needs feature attributions explaining which inputs influenced individual credit predictions. The matching action for this case is: Generate supported Clarify model-explainability reports and review them for stability and reasonableness.

Question 284

An ML engineering team faces this production constraint: An existing SageMaker Debugger customer sees a deep network loss become NaN, with exploding gradient magnitudes suspected on certain batches. Which action best addresses the actual requirement?

  1. Analyze which true classes are confused with predicted classes and target those errors.
  2. Use F1 as a joint precision-and-recall measure for model comparison.
  3. Try more expressive features or a model family with sufficient capacity and reassess both splits.
  4. Instrument the training job and investigate exploding gradients, invalid inputs, and optimizer settings.

Explanation

Correct Answer

D:

This action fits the situation: An existing SageMaker Debugger customer sees a deep network loss become NaN, with exploding gradient magnitudes suspected on certain batches. It implements the needed technical control: Instrument the training job and investigate exploding gradients, invalid inputs, and optimizer settings. The intended outcome is that the team can identify the step and tensor behavior associated with nonconvergence. The important limitation is that raising epoch count cannot repair numerical overflow; SageMaker Debugger is available only to earlier customers after July 30, 2026.

Incorrect Answers

A:

This action is appropriate for another requirement: A warehouse defect classifier misses scratch defects but handles dents accurately, and its overall accuracy does not reveal the category-specific mistake. It does not solve the presented constraint: An existing SageMaker Debugger customer sees a deep network loss become NaN, with exploding gradient magnitudes suspected on certain batches. The matching action for this case is: Instrument the training job and investigate exploding gradients, invalid inputs, and optimizer settings.

B:

This action is appropriate for another requirement: An extremely imbalanced email classifier needs one summary of precision and recall rather than overall accuracy inflated by negative examples. It does not solve the presented constraint: An existing SageMaker Debugger customer sees a deep network loss become NaN, with exploding gradient magnitudes suspected on certain batches. The matching action for this case is: Instrument the training job and investigate exploding gradients, invalid inputs, and optimizer settings.

C:

This action is appropriate for another requirement: Both training and validation errors remain high for a simple linear model that cannot capture a clear nonlinear relationship. It does not solve the presented constraint: An existing SageMaker Debugger customer sees a deep network loss become NaN, with exploding gradient magnitudes suspected on certain batches. The matching action for this case is: Instrument the training job and investigate exploding gradients, invalid inputs, and optimizer settings.

Question 285

A cloud ML change request describes the following issue: A product team wants to compare a newly trained model against the current production model without allowing the candidate to make user-facing decisions. Which action best addresses the actual requirement?

  1. Use RMSE for regression comparison when large errors deserve disproportionate weight.
  2. Compare ROC-AUC on the same labeled evaluation partition.
  3. Use F1 as a joint precision-and-recall measure for model comparison.
  4. Run a supported SageMaker shadow test with a candidate variant receiving mirrored requests.

Explanation

Correct Answer

D:

This action fits the situation: A product team wants to compare a newly trained model against the current production model without allowing the candidate to make user-facing decisions. It implements the needed technical control: Run a supported SageMaker shadow test with a candidate variant receiving mirrored requests. The intended outcome is that the team observes candidate behavior on representative traffic without replacing production predictions. The important limitation is that shadow testing does not provide randomized online conversion impact like a live A/B experiment.

Incorrect Answers

A:

This action is appropriate for another requirement: A forecasting system predicts monthly electricity costs, and the business wants large monetary mistakes penalized more strongly than small ones. It does not solve the presented constraint: A product team wants to compare a newly trained model against the current production model without allowing the candidate to make user-facing decisions. The matching action for this case is: Run a supported SageMaker shadow test with a candidate variant receiving mirrored requests.

B:

This action is appropriate for another requirement: Two binary models should be compared on relative discrimination across all possible thresholds rather than their accuracy at one arbitrary cutoff. It does not solve the presented constraint: A product team wants to compare a newly trained model against the current production model without allowing the candidate to make user-facing decisions. The matching action for this case is: Run a supported SageMaker shadow test with a candidate variant receiving mirrored requests.

C:

This action is appropriate for another requirement: An extremely imbalanced email classifier needs one summary of precision and recall rather than overall accuracy inflated by negative examples. It does not solve the presented constraint: A product team wants to compare a newly trained model against the current production model without allowing the candidate to make user-facing decisions. The matching action for this case is: Run a supported SageMaker shadow test with a candidate variant receiving mirrored requests.

Question 286

During a production readiness audit, three independent ML pipeline behaviors must be verified. Workstream A: An automated fraud-review queue has limited analyst capacity and each false alarm incurs substantial review cost, so the team wants fewer false alerts among flagged payments. Workstream B: A forecasting system predicts monthly electricity costs, and the business wants large monetary mistakes penalized more strongly than small ones. Workstream C: An XGBoost model achieves near-perfect training accuracy but sharply worse validation accuracy after adding many trees. Select exactly THREE observations, one diagnostic that directly tests each workstream.

  1. Calculate squared prediction errors, their average, and the square root in the holdout set.
  2. Inspect SageMaker Clarify SHAP-style attribution values for representative records and groups.
  3. Compare training and validation curves while increasing model capacity.
  4. Inspect true-positive versus false-positive rates across thresholds and calculate ROC-AUC.
  5. Inspect a labeled multiclass confusion matrix broken down by defect type.
  6. Compute TP divided by TP plus FP from the labeled holdout predictions.

Explanation

Correct Answers

A:

This evidence directly tests the reported behavior: Calculate squared prediction errors, their average, and the square root in the holdout set. For this case, a forecasting system predicts monthly electricity costs, and the business wants large monetary mistakes penalized more strongly than small ones. The results tell the team whether to apply the targeted change: Use RMSE for regression comparison when large errors deserve disproportionate weight.

C:

This evidence directly tests the reported behavior: Compare training and validation curves while increasing model capacity. For this case, an XGBoost model achieves near-perfect training accuracy but sharply worse validation accuracy after adding many trees. The results tell the team whether to apply the targeted change: Reduce overfitting with appropriate depth, regularization, early stopping, or more representative training data.

F:

This evidence directly tests the reported behavior: Compute TP divided by TP plus FP from the labeled holdout predictions. For this case, an automated fraud-review queue has limited analyst capacity and each false alarm incurs substantial review cost, so the team wants fewer false alerts among flagged payments. The results tell the team whether to apply the targeted change: Evaluate and tune precision at the planned decision threshold while tracking recall.

Incorrect Answers

B:

That alternative addresses a different task: A regulated lender with existing SageMaker Clarify access needs feature attributions explaining which inputs influenced individual credit predictions. The selected workloads instead require Precision on expensive alerts, Root mean squared error, Overfitting performance gap.

D:

That alternative addresses a different task: Two binary models should be compared on relative discrimination across all possible thresholds rather than their accuracy at one arbitrary cutoff. The selected workloads instead require Precision on expensive alerts, Root mean squared error, Overfitting performance gap.

E:

That alternative addresses a different task: A warehouse defect classifier misses scratch defects but handles dents accurately, and its overall accuracy does not reveal the category-specific mistake. The selected workloads instead require Precision on expensive alerts, Root mean squared error, Overfitting performance gap.

Question 287

During a production readiness audit, three independent ML pipeline behaviors must be verified. Workstream A: A screening classifier is used to find high-risk cases where an undetected positive case carries a substantial cost. Workstream B: A home-price model sometimes sees exceptional luxury homes, and typical absolute monetary error is more meaningful than punishing extreme residuals quadratically. Workstream C: Both training and validation errors remain high for a simple linear model that cannot capture a clear nonlinear relationship. Select exactly THREE observations, one diagnostic that directly tests each workstream.

  1. Compare precision-recall curves and average precision on an untouched rare-event evaluation set.
  2. Calculate TP divided by TP plus FN for an appropriately sampled held-out population.
  3. Inspect training and validation residual patterns under candidate model families.
  4. Compute the confusion matrix and F1 on labeled holdout messages.
  5. Inspect a labeled multiclass confusion matrix broken down by defect type.
  6. Review average absolute residuals and the tail of the observed price distribution.

Explanation

Correct Answers

B:

This evidence directly tests the reported behavior: Calculate TP divided by TP plus FN for an appropriately sampled held-out population. For this case, a screening classifier is used to find high-risk cases where an undetected positive case carries a substantial cost. The results tell the team whether to apply the targeted change: Evaluate recall and adjust the operating threshold while monitoring false-positive burden.

C:

This evidence directly tests the reported behavior: Inspect training and validation residual patterns under candidate model families. For this case, both training and validation errors remain high for a simple linear model that cannot capture a clear nonlinear relationship. The results tell the team whether to apply the targeted change: Try more expressive features or a model family with sufficient capacity and reassess both splits.

F:

This evidence directly tests the reported behavior: Review average absolute residuals and the tail of the observed price distribution. For this case, a home-price model sometimes sees exceptional luxury homes, and typical absolute monetary error is more meaningful than punishing extreme residuals quadratically. The results tell the team whether to apply the targeted change: Use MAE to summarize absolute prediction error in the original target units.

Incorrect Answers

A:

That alternative addresses a different task: A security pipeline predicts rare account compromises and ROC plots appear optimistic because there are overwhelmingly many negative events. The selected workloads instead require Recall for missed diagnoses, Mean absolute error, Underfit learning diagnostic.

D:

That alternative addresses a different task: An extremely imbalanced email classifier needs one summary of precision and recall rather than overall accuracy inflated by negative examples. The selected workloads instead require Recall for missed diagnoses, Mean absolute error, Underfit learning diagnostic.

E:

That alternative addresses a different task: A warehouse defect classifier misses scratch defects but handles dents accurately, and its overall accuracy does not reveal the category-specific mistake. The selected workloads instead require Recall for missed diagnoses, Mean absolute error, Underfit learning diagnostic.

Question 288

During a production readiness audit, three independent ML pipeline behaviors must be verified. Workstream A: An extremely imbalanced email classifier needs one summary of precision and recall rather than overall accuracy inflated by negative examples. Workstream B: A warehouse defect classifier misses scratch defects but handles dents accurately, and its overall accuracy does not reveal the category-specific mistake. Workstream C: A regulated lender with existing SageMaker Clarify access needs feature attributions explaining which inputs influenced individual credit predictions. Select exactly THREE observations, one diagnostic that directly tests each workstream.

  1. Review average absolute residuals and the tail of the observed price distribution.
  2. Inspect SageMaker Clarify SHAP-style attribution values for representative records and groups.
  3. Compare training and validation curves while increasing model capacity.
  4. Compare precision-recall curves and average precision on an untouched rare-event evaluation set.
  5. Inspect a labeled multiclass confusion matrix broken down by defect type.
  6. Compute the confusion matrix and F1 on labeled holdout messages.

Explanation

Correct Answers

B:

This evidence directly tests the reported behavior: Inspect SageMaker Clarify SHAP-style attribution values for representative records and groups. For this case, a regulated lender with existing SageMaker Clarify access needs feature attributions explaining which inputs influenced individual credit predictions. The results tell the team whether to apply the targeted change: Generate supported Clarify model-explainability reports and review them for stability and reasonableness.

E:

This evidence directly tests the reported behavior: Inspect a labeled multiclass confusion matrix broken down by defect type. For this case, a warehouse defect classifier misses scratch defects but handles dents accurately, and its overall accuracy does not reveal the category-specific mistake. The results tell the team whether to apply the targeted change: Analyze which true classes are confused with predicted classes and target those errors.

F:

This evidence directly tests the reported behavior: Compute the confusion matrix and F1 on labeled holdout messages. For this case, an extremely imbalanced email classifier needs one summary of precision and recall rather than overall accuracy inflated by negative examples. The results tell the team whether to apply the targeted change: Use F1 as a joint precision-and-recall measure for model comparison.

Incorrect Answers

A:

That alternative addresses a different task: A home-price model sometimes sees exceptional luxury homes, and typical absolute monetary error is more meaningful than punishing extreme residuals quadratically. The selected workloads instead require Harmonic precision recall metric, Confusion matrix root causes, Model explanation feature attribution.

C:

That alternative addresses a different task: An XGBoost model achieves near-perfect training accuracy but sharply worse validation accuracy after adding many trees. The selected workloads instead require Harmonic precision recall metric, Confusion matrix root causes, Model explanation feature attribution.

D:

That alternative addresses a different task: A security pipeline predicts rare account compromises and ROC plots appear optimistic because there are overwhelmingly many negative events. The selected workloads instead require Harmonic precision recall metric, Confusion matrix root causes, Model explanation feature attribution.

Question 289

During a production readiness audit, three independent ML pipeline behaviors must be verified. Workstream A: A security pipeline predicts rare account compromises and ROC plots appear optimistic because there are overwhelmingly many negative events. Workstream B: An XGBoost model achieves near-perfect training accuracy but sharply worse validation accuracy after adding many trees. Workstream C: An existing SageMaker Debugger customer sees a deep network loss become NaN, with exploding gradient magnitudes suspected on certain batches. Select exactly THREE observations, one diagnostic that directly tests each workstream.

  1. Inspect true-positive versus false-positive rates across thresholds and calculate ROC-AUC.
  2. Calculate TP divided by TP plus FN for an appropriately sampled held-out population.
  3. Compare training and validation curves while increasing model capacity.
  4. Compute TP divided by TP plus FP from the labeled holdout predictions.
  5. Inspect SageMaker Debugger gradient and training tensor rules where supported.
  6. Compare precision-recall curves and average precision on an untouched rare-event evaluation set.

Explanation

Correct Answers

C:

This evidence directly tests the reported behavior: Compare training and validation curves while increasing model capacity. For this case, an XGBoost model achieves near-perfect training accuracy but sharply worse validation accuracy after adding many trees. The results tell the team whether to apply the targeted change: Reduce overfitting with appropriate depth, regularization, early stopping, or more representative training data.

E:

This evidence directly tests the reported behavior: Inspect SageMaker Debugger gradient and training tensor rules where supported. For this case, an existing SageMaker Debugger customer sees a deep network loss become NaN, with exploding gradient magnitudes suspected on certain batches. The results tell the team whether to apply the targeted change: Instrument the training job and investigate exploding gradients, invalid inputs, and optimizer settings.

F:

This evidence directly tests the reported behavior: Compare precision-recall curves and average precision on an untouched rare-event evaluation set. For this case, a security pipeline predicts rare account compromises and ROC plots appear optimistic because there are overwhelmingly many negative events. The results tell the team whether to apply the targeted change: Use PR-AUC or average precision to assess ranking quality for positive events.

Incorrect Answers

A:

That alternative addresses a different task: Two binary models should be compared on relative discrimination across all possible thresholds rather than their accuracy at one arbitrary cutoff. The selected workloads instead require Rare event PR curve, Overfitting performance gap, Training convergence diagnosis.

B:

That alternative addresses a different task: A screening classifier is used to find high-risk cases where an undetected positive case carries a substantial cost. The selected workloads instead require Rare event PR curve, Overfitting performance gap, Training convergence diagnosis.

D:

That alternative addresses a different task: An automated fraud-review queue has limited analyst capacity and each false alarm incurs substantial review cost, so the team wants fewer false alerts among flagged payments. The selected workloads instead require Rare event PR curve, Overfitting performance gap, Training convergence diagnosis.

Question 290

During a production readiness audit, three independent ML pipeline behaviors must be verified. Workstream A: Two binary models should be compared on relative discrimination across all possible thresholds rather than their accuracy at one arbitrary cutoff. Workstream B: Both training and validation errors remain high for a simple linear model that cannot capture a clear nonlinear relationship. Workstream C: A product team wants to compare a newly trained model against the current production model without allowing the candidate to make user-facing decisions. Select exactly THREE observations, one diagnostic that directly tests each workstream.

  1. Inspect true-positive versus false-positive rates across thresholds and calculate ROC-AUC.
  2. Inspect training and validation residual patterns under candidate model families.
  3. Compute the confusion matrix and F1 on labeled holdout messages.
  4. Compute TP divided by TP plus FP from the labeled holdout predictions.
  5. Calculate TP divided by TP plus FN for an appropriately sampled held-out population.
  6. Inspect a shadow variant's captured predictions and latency against the live endpoint responses.

Explanation

Correct Answers

A:

This evidence directly tests the reported behavior: Inspect true-positive versus false-positive rates across thresholds and calculate ROC-AUC. For this case, two binary models should be compared on relative discrimination across all possible thresholds rather than their accuracy at one arbitrary cutoff. The results tell the team whether to apply the targeted change: Compare ROC-AUC on the same labeled evaluation partition.

B:

This evidence directly tests the reported behavior: Inspect training and validation residual patterns under candidate model families. For this case, both training and validation errors remain high for a simple linear model that cannot capture a clear nonlinear relationship. The results tell the team whether to apply the targeted change: Try more expressive features or a model family with sufficient capacity and reassess both splits.

F:

This evidence directly tests the reported behavior: Inspect a shadow variant's captured predictions and latency against the live endpoint responses. For this case, a product team wants to compare a newly trained model against the current production model without allowing the candidate to make user-facing decisions. The results tell the team whether to apply the targeted change: Run a supported SageMaker shadow test with a candidate variant receiving mirrored requests.

Incorrect Answers

C:

That alternative addresses a different task: An extremely imbalanced email classifier needs one summary of precision and recall rather than overall accuracy inflated by negative examples. The selected workloads instead require Threshold independent ROC ranking, Underfit learning diagnostic, Shadow versus live experiment.

D:

That alternative addresses a different task: An automated fraud-review queue has limited analyst capacity and each false alarm incurs substantial review cost, so the team wants fewer false alerts among flagged payments. The selected workloads instead require Threshold independent ROC ranking, Underfit learning diagnostic, Shadow versus live experiment.

E:

That alternative addresses a different task: A screening classifier is used to find high-risk cases where an undetected positive case carries a substantial cost. The selected workloads instead require Threshold independent ROC ranking, Underfit learning diagnostic, Shadow versus live experiment.

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