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Amazon AWS Certified Machine Learning Engineer - Associate MLA-C01 Practice Test 14
Question 130
During a production readiness audit, three independent ML pipeline behaviors must be verified. Workstream A: An energy-demand forecasting model was evaluated using randomly shuffled observations even though production predicts future days. Workstream B: An auditor must trace a prediction feature back to its original S3 object, Glue job run, and data processing version after a model incident. Workstream C: The same customer appears in nearly identical records across training and evaluation splits, yielding unrealistic customer churn accuracy. Select exactly THREE observations, one diagnostic that directly tests each workstream.
- Inspect entity IDs and duplicated normalized record fingerprints across split boundaries.
- Review PII classification results and inspect sample redaction outputs against a protected holdout.
- Review group-conditioned label distributions and SageMaker Clarify pretraining bias reports.
- Review label confusion and agreement on an adjudicated representative sample.
- Inspect dataset manifests and AWS Glue Data Catalog lineage metadata available in the workflow.
- Inspect timestamps of training features and target observations across the proposed evaluation boundary.
Explanation
Correct Answers
A:This evidence directly tests the reported behavior: Inspect entity IDs and duplicated normalized record fingerprints across split boundaries. For this case, the same customer appears in nearly identical records across training and evaluation splits, yielding unrealistic customer churn accuracy. The results tell the team whether to apply the targeted change: Deduplicate appropriate rows and group records by entity before assigning train/test partitions.
E:This evidence directly tests the reported behavior: Inspect dataset manifests and AWS Glue Data Catalog lineage metadata available in the workflow. For this case, an auditor must trace a prediction feature back to its original S3 object, Glue job run, and data processing version after a model incident. The results tell the team whether to apply the targeted change: Record immutable input references, job identifiers, schemas, and transformation versions in the data catalog lineage.
F:This evidence directly tests the reported behavior: Inspect timestamps of training features and target observations across the proposed evaluation boundary. For this case, an energy-demand forecasting model was evaluated using randomly shuffled observations even though production predicts future days. The results tell the team whether to apply the targeted change: Use a time-ordered split with training history strictly preceding the evaluation interval.
Incorrect Answers
B:That alternative addresses a different task: A hospital exports clinical text into a shared ML feature workspace and must remove patient identifiers while retaining useful nonidentifying signals. The selected workloads instead require Chronological evaluation window, Provenance across transformations, Duplicate entity leakage.
C:That alternative addresses a different task: A lender already using SageMaker Clarify has much fewer approved loans from one demographic subgroup and needs a measured dataset bias check before modeling. The selected workloads instead require Chronological evaluation window, Provenance across transformations, Duplicate entity leakage.
D:That alternative addresses a different task: A text moderation classifier has confusing class definitions and annotators disagree about which of two labels applies to borderline tickets. The selected workloads instead require Chronological evaluation window, Provenance across transformations, Duplicate entity leakage.
Question 131
During a production readiness audit, three independent ML pipeline behaviors must be verified. Workstream A: A hospital exports clinical text into a shared ML feature workspace and must remove patient identifiers while retaining useful nonidentifying signals. Workstream B: A text moderation classifier has confusing class definitions and annotators disagree about which of two labels applies to borderline tickets. Workstream C: A defective-parts classifier predicts the majority good class for nearly every example because defective units are rare and accuracy appears high. Select exactly THREE observations, one diagnostic that directly tests each workstream.
- Inspect account/bucket S3 Block Public Access and effective bucket policy evaluation.
- Measure file-system shared read throughput and worker saturation against available FSx options.
- Inspect class prevalence and minority recall before and after weighting changes.
- Compare observed feature schema to the approved training contract and validation errors.
- Review PII classification results and inspect sample redaction outputs against a protected holdout.
- Review label confusion and agreement on an adjudicated representative sample.
Explanation
Correct Answers
C:This evidence directly tests the reported behavior: Inspect class prevalence and minority recall before and after weighting changes. For this case, a defective-parts classifier predicts the majority good class for nearly every example because defective units are rare and accuracy appears high. The results tell the team whether to apply the targeted change: Apply suitable class weights or resampling on training data and evaluate minority recall or F1.
E:This evidence directly tests the reported behavior: Review PII classification results and inspect sample redaction outputs against a protected holdout. For this case, a hospital exports clinical text into a shared ML feature workspace and must remove patient identifiers while retaining useful nonidentifying signals. The results tell the team whether to apply the targeted change: Deidentify or tokenize personal identifiers before shared processing and restrict the raw originals.
F:This evidence directly tests the reported behavior: Review label confusion and agreement on an adjudicated representative sample. For this case, a text moderation classifier has confusing class definitions and annotators disagree about which of two labels applies to borderline tickets. The results tell the team whether to apply the targeted change: Refine annotation instructions, adjudicate ambiguous examples, and relabel affected training data.
Incorrect Answers
A:That alternative addresses a different task: Model input CSV files are written into an S3 bucket that mistakenly has a permissive ACL, and compliance forbids anonymous access regardless of the object setting. The selected workloads instead require Masked sensitive inputs, Unreliable ground truth labels, class-imbalance handling.
B:That alternative addresses a different task: A training job repeatedly reads a shared block of feature matrices and needs much faster parallel data access than the current single-volume setup. The selected workloads instead require Masked sensitive inputs, Unreliable ground truth labels, class-imbalance handling.
D:That alternative addresses a different task: A feature producer changes a numeric transaction count to a string, causing model inference preprocessing to fail despite successful S3 ingestion. The selected workloads instead require Masked sensitive inputs, Unreliable ground truth labels, class-imbalance handling.
Question 132
Before making a production change, an engineer must investigate this condition: A regulated ML team stores customer data in S3 and wants control over encryption-key access by execution role and audited key usage. Which diagnostic observation most directly evaluates the reported condition?
- Compare observed feature schema to the approved training contract and validation errors.
- Measure file-system shared read throughput and worker saturation against available FSx options.
- Inspect S3 default encryption settings and KMS key policy permissions for the ML processing role.
- Count positive labels across training, validation, and test after candidate splits.
Explanation
Correct Answer
C:This evidence directly tests the reported behavior: Inspect S3 default encryption settings and KMS key policy permissions for the ML processing role. For this case, a regulated ML team stores customer data in S3 and wants control over encryption-key access by execution role and audited key usage. The results tell the team whether to apply the targeted change: Use S3 server-side encryption with an appropriately restricted customer-managed KMS key.
Incorrect Answers
A:That diagnostic measures a different AWS ML behavior: A feature producer changes a numeric transaction count to a string, causing model inference preprocessing to fail despite successful S3 ingestion. It cannot establish the main condition: A regulated ML team stores customer data in S3 and wants control over encryption-key access by execution role and audited key usage. The decisive evidence for this case is: Inspect S3 default encryption settings and KMS key policy permissions for the ML processing role.
B:That diagnostic measures a different AWS ML behavior: A training job repeatedly reads a shared block of feature matrices and needs much faster parallel data access than the current single-volume setup. It cannot establish the main condition: A regulated ML team stores customer data in S3 and wants control over encryption-key access by execution role and audited key usage. The decisive evidence for this case is: Inspect S3 default encryption settings and KMS key policy permissions for the ML processing role.
D:That diagnostic measures a different AWS ML behavior: Only 2 percent of historical medical claims are fraudulent, and random splitting sometimes leaves too few fraud examples in evaluation data. It cannot establish the main condition: A regulated ML team stores customer data in S3 and wants control over encryption-key access by execution role and audited key usage. The decisive evidence for this case is: Inspect S3 default encryption settings and KMS key policy permissions for the ML processing role.
Question 133
The ML operations team needs direct evidence about this situation: Model input CSV files are written into an S3 bucket that mistakenly has a permissive ACL, and compliance forbids anonymous access regardless of the object setting. Which diagnostic observation most directly evaluates the reported condition?
- Measure file-system shared read throughput and worker saturation against available FSx options.
- Inspect account/bucket S3 Block Public Access and effective bucket policy evaluation.
- Review group-conditioned label distributions and SageMaker Clarify pretraining bias reports.
- Review PII classification results and inspect sample redaction outputs against a protected holdout.
Explanation
Correct Answer
B:This evidence directly tests the reported behavior: Inspect account/bucket S3 Block Public Access and effective bucket policy evaluation. For this case, model input CSV files are written into an S3 bucket that mistakenly has a permissive ACL, and compliance forbids anonymous access regardless of the object setting. The results tell the team whether to apply the targeted change: Enable S3 Block Public Access and apply a restricted bucket policy for approved principals.
Incorrect Answers
A:That diagnostic measures a different AWS ML behavior: A training job repeatedly reads a shared block of feature matrices and needs much faster parallel data access than the current single-volume setup. It cannot establish the main condition: Model input CSV files are written into an S3 bucket that mistakenly has a permissive ACL, and compliance forbids anonymous access regardless of the object setting. The decisive evidence for this case is: Inspect account/bucket S3 Block Public Access and effective bucket policy evaluation.
C:That diagnostic measures a different AWS ML behavior: A lender already using SageMaker Clarify has much fewer approved loans from one demographic subgroup and needs a measured dataset bias check before modeling. It cannot establish the main condition: Model input CSV files are written into an S3 bucket that mistakenly has a permissive ACL, and compliance forbids anonymous access regardless of the object setting. The decisive evidence for this case is: Inspect account/bucket S3 Block Public Access and effective bucket policy evaluation.
D:That diagnostic measures a different AWS ML behavior: A hospital exports clinical text into a shared ML feature workspace and must remove patient identifiers while retaining useful nonidentifying signals. It cannot establish the main condition: Model input CSV files are written into an S3 bucket that mistakenly has a permissive ACL, and compliance forbids anonymous access regardless of the object setting. The decisive evidence for this case is: Inspect account/bucket S3 Block Public Access and effective bucket policy evaluation.
Question 134
A data-science incident must be diagnosed without guessing: A feature producer changes a numeric transaction count to a string, causing model inference preprocessing to fail despite successful S3 ingestion. Which diagnostic observation most directly evaluates the reported condition?
- Compare observed feature schema to the approved training contract and validation errors.
- Inspect entity IDs and duplicated normalized record fingerprints across split boundaries.
- Review label confusion and agreement on an adjudicated representative sample.
- Review PII classification results and inspect sample redaction outputs against a protected holdout.
Explanation
Correct Answer
A:This evidence directly tests the reported behavior: Compare observed feature schema to the approved training contract and validation errors. For this case, a feature producer changes a numeric transaction count to a string, causing model inference preprocessing to fail despite successful S3 ingestion. The results tell the team whether to apply the targeted change: Enforce schema and type validation at ingestion and quarantine incompatible records.
Incorrect Answers
B:That diagnostic measures a different AWS ML behavior: The same customer appears in nearly identical records across training and evaluation splits, yielding unrealistic customer churn accuracy. It cannot establish the main condition: A feature producer changes a numeric transaction count to a string, causing model inference preprocessing to fail despite successful S3 ingestion. The decisive evidence for this case is: Compare observed feature schema to the approved training contract and validation errors.
C:That diagnostic measures a different AWS ML behavior: A text moderation classifier has confusing class definitions and annotators disagree about which of two labels applies to borderline tickets. It cannot establish the main condition: A feature producer changes a numeric transaction count to a string, causing model inference preprocessing to fail despite successful S3 ingestion. The decisive evidence for this case is: Compare observed feature schema to the approved training contract and validation errors.
D:That diagnostic measures a different AWS ML behavior: A hospital exports clinical text into a shared ML feature workspace and must remove patient identifiers while retaining useful nonidentifying signals. It cannot establish the main condition: A feature producer changes a numeric transaction count to a string, causing model inference preprocessing to fail despite successful S3 ingestion. The decisive evidence for this case is: Compare observed feature schema to the approved training contract and validation errors.
Question 135
Before making a production change, an engineer must investigate this condition: An auditor must trace a prediction feature back to its original S3 object, Glue job run, and data processing version after a model incident. Which diagnostic observation most directly evaluates the reported condition?
- Review label confusion and agreement on an adjudicated representative sample.
- Count positive labels across training, validation, and test after candidate splits.
- Review group-conditioned label distributions and SageMaker Clarify pretraining bias reports.
- Inspect dataset manifests and AWS Glue Data Catalog lineage metadata available in the workflow.
Explanation
Correct Answer
D:This evidence directly tests the reported behavior: Inspect dataset manifests and AWS Glue Data Catalog lineage metadata available in the workflow. For this case, an auditor must trace a prediction feature back to its original S3 object, Glue job run, and data processing version after a model incident. The results tell the team whether to apply the targeted change: Record immutable input references, job identifiers, schemas, and transformation versions in the data catalog lineage.
Incorrect Answers
A:That diagnostic measures a different AWS ML behavior: A text moderation classifier has confusing class definitions and annotators disagree about which of two labels applies to borderline tickets. It cannot establish the main condition: An auditor must trace a prediction feature back to its original S3 object, Glue job run, and data processing version after a model incident. The decisive evidence for this case is: Inspect dataset manifests and AWS Glue Data Catalog lineage metadata available in the workflow.
B:That diagnostic measures a different AWS ML behavior: Only 2 percent of historical medical claims are fraudulent, and random splitting sometimes leaves too few fraud examples in evaluation data. It cannot establish the main condition: An auditor must trace a prediction feature back to its original S3 object, Glue job run, and data processing version after a model incident. The decisive evidence for this case is: Inspect dataset manifests and AWS Glue Data Catalog lineage metadata available in the workflow.
C:That diagnostic measures a different AWS ML behavior: A lender already using SageMaker Clarify has much fewer approved loans from one demographic subgroup and needs a measured dataset bias check before modeling. It cannot establish the main condition: An auditor must trace a prediction feature back to its original S3 object, Glue job run, and data processing version after a model incident. The decisive evidence for this case is: Inspect dataset manifests and AWS Glue Data Catalog lineage metadata available in the workflow.
Question 136
The ML operations team needs direct evidence about this situation: A text moderation classifier has confusing class definitions and annotators disagree about which of two labels applies to borderline tickets. Which diagnostic observation most directly evaluates the reported condition?
- Inspect account/bucket S3 Block Public Access and effective bucket policy evaluation.
- Review label confusion and agreement on an adjudicated representative sample.
- Compare observed feature schema to the approved training contract and validation errors.
- Inspect AWS Glue Data Quality rule evaluation results for null and value-range violations.
Explanation
Correct Answer
B:This evidence directly tests the reported behavior: Review label confusion and agreement on an adjudicated representative sample. For this case, a text moderation classifier has confusing class definitions and annotators disagree about which of two labels applies to borderline tickets. The results tell the team whether to apply the targeted change: Refine annotation instructions, adjudicate ambiguous examples, and relabel affected training data.
Incorrect Answers
A:That diagnostic measures a different AWS ML behavior: Model input CSV files are written into an S3 bucket that mistakenly has a permissive ACL, and compliance forbids anonymous access regardless of the object setting. It cannot establish the main condition: A text moderation classifier has confusing class definitions and annotators disagree about which of two labels applies to borderline tickets. The decisive evidence for this case is: Review label confusion and agreement on an adjudicated representative sample.
C:That diagnostic measures a different AWS ML behavior: A feature producer changes a numeric transaction count to a string, causing model inference preprocessing to fail despite successful S3 ingestion. It cannot establish the main condition: A text moderation classifier has confusing class definitions and annotators disagree about which of two labels applies to borderline tickets. The decisive evidence for this case is: Review label confusion and agreement on an adjudicated representative sample.
D:That diagnostic measures a different AWS ML behavior: A data lake receives a daily product feed that must have nonnull customer keys and positive amounts before it enters feature processing. It cannot establish the main condition: A text moderation classifier has confusing class definitions and annotators disagree about which of two labels applies to borderline tickets. The decisive evidence for this case is: Review label confusion and agreement on an adjudicated representative sample.
Question 137
A data-science incident must be diagnosed without guessing: A training job repeatedly reads a shared block of feature matrices and needs much faster parallel data access than the current single-volume setup. Which diagnostic observation most directly evaluates the reported condition?
- Measure file-system shared read throughput and worker saturation against available FSx options.
- Inspect account/bucket S3 Block Public Access and effective bucket policy evaluation.
- Inspect class prevalence and minority recall before and after weighting changes.
- Inspect S3 default encryption settings and KMS key policy permissions for the ML processing role.
Explanation
Correct Answer
A:This evidence directly tests the reported behavior: Measure file-system shared read throughput and worker saturation against available FSx options. For this case, a training job repeatedly reads a shared block of feature matrices and needs much faster parallel data access than the current single-volume setup. The results tell the team whether to apply the targeted change: Choose a compatible shared high-performance training filesystem such as FSx for Lustre when justified.
Incorrect Answers
B:That diagnostic measures a different AWS ML behavior: Model input CSV files are written into an S3 bucket that mistakenly has a permissive ACL, and compliance forbids anonymous access regardless of the object setting. It cannot establish the main condition: A training job repeatedly reads a shared block of feature matrices and needs much faster parallel data access than the current single-volume setup. The decisive evidence for this case is: Measure file-system shared read throughput and worker saturation against available FSx options.
C:That diagnostic measures a different AWS ML behavior: A defective-parts classifier predicts the majority good class for nearly every example because defective units are rare and accuracy appears high. It cannot establish the main condition: A training job repeatedly reads a shared block of feature matrices and needs much faster parallel data access than the current single-volume setup. The decisive evidence for this case is: Measure file-system shared read throughput and worker saturation against available FSx options.
D:That diagnostic measures a different AWS ML behavior: A regulated ML team stores customer data in S3 and wants control over encryption-key access by execution role and audited key usage. It cannot establish the main condition: A training job repeatedly reads a shared block of feature matrices and needs much faster parallel data access than the current single-volume setup. The decisive evidence for this case is: Measure file-system shared read throughput and worker saturation against available FSx options.
Question 138
Before making a production change, an engineer must investigate this condition: The same customer appears in nearly identical records across training and evaluation splits, yielding unrealistic customer churn accuracy. Which diagnostic observation most directly evaluates the reported condition?
- Inspect entity IDs and duplicated normalized record fingerprints across split boundaries.
- Compare observed feature schema to the approved training contract and validation errors.
- Count positive labels across training, validation, and test after candidate splits.
- Measure file-system shared read throughput and worker saturation against available FSx options.
Explanation
Correct Answer
A:This evidence directly tests the reported behavior: Inspect entity IDs and duplicated normalized record fingerprints across split boundaries. For this case, the same customer appears in nearly identical records across training and evaluation splits, yielding unrealistic customer churn accuracy. The results tell the team whether to apply the targeted change: Deduplicate appropriate rows and group records by entity before assigning train/test partitions.
Incorrect Answers
B:That diagnostic measures a different AWS ML behavior: A feature producer changes a numeric transaction count to a string, causing model inference preprocessing to fail despite successful S3 ingestion. It cannot establish the main condition: The same customer appears in nearly identical records across training and evaluation splits, yielding unrealistic customer churn accuracy. The decisive evidence for this case is: Inspect entity IDs and duplicated normalized record fingerprints across split boundaries.
C:That diagnostic measures a different AWS ML behavior: Only 2 percent of historical medical claims are fraudulent, and random splitting sometimes leaves too few fraud examples in evaluation data. It cannot establish the main condition: The same customer appears in nearly identical records across training and evaluation splits, yielding unrealistic customer churn accuracy. The decisive evidence for this case is: Inspect entity IDs and duplicated normalized record fingerprints across split boundaries.
D:That diagnostic measures a different AWS ML behavior: A training job repeatedly reads a shared block of feature matrices and needs much faster parallel data access than the current single-volume setup. It cannot establish the main condition: The same customer appears in nearly identical records across training and evaluation splits, yielding unrealistic customer churn accuracy. The decisive evidence for this case is: Inspect entity IDs and duplicated normalized record fingerprints across split boundaries.
Question 139
The ML operations team needs direct evidence about this situation: A defective-parts classifier predicts the majority good class for nearly every example because defective units are rare and accuracy appears high. Which diagnostic observation most directly evaluates the reported condition?
- Review group-conditioned label distributions and SageMaker Clarify pretraining bias reports.
- Measure file-system shared read throughput and worker saturation against available FSx options.
- Inspect class prevalence and minority recall before and after weighting changes.
- Compare observed feature schema to the approved training contract and validation errors.
Explanation
Correct Answer
C:This evidence directly tests the reported behavior: Inspect class prevalence and minority recall before and after weighting changes. For this case, a defective-parts classifier predicts the majority good class for nearly every example because defective units are rare and accuracy appears high. The results tell the team whether to apply the targeted change: Apply suitable class weights or resampling on training data and evaluate minority recall or F1.
Incorrect Answers
A:That diagnostic measures a different AWS ML behavior: A lender already using SageMaker Clarify has much fewer approved loans from one demographic subgroup and needs a measured dataset bias check before modeling. It cannot establish the main condition: A defective-parts classifier predicts the majority good class for nearly every example because defective units are rare and accuracy appears high. The decisive evidence for this case is: Inspect class prevalence and minority recall before and after weighting changes.
B:That diagnostic measures a different AWS ML behavior: A training job repeatedly reads a shared block of feature matrices and needs much faster parallel data access than the current single-volume setup. It cannot establish the main condition: A defective-parts classifier predicts the majority good class for nearly every example because defective units are rare and accuracy appears high. The decisive evidence for this case is: Inspect class prevalence and minority recall before and after weighting changes.
D:That diagnostic measures a different AWS ML behavior: A feature producer changes a numeric transaction count to a string, causing model inference preprocessing to fail despite successful S3 ingestion. It cannot establish the main condition: A defective-parts classifier predicts the majority good class for nearly every example because defective units are rare and accuracy appears high. The decisive evidence for this case is: Inspect class prevalence and minority recall before and after weighting changes.
Question 140
A data-science incident must be diagnosed without guessing: An international organization must train a model using regional customer data without copying identifiable records into another AWS Region. Which diagnostic observation most directly evaluates the reported condition?
- Review group-conditioned label distributions and SageMaker Clarify pretraining bias reports.
- Inspect bucket Region, cross-Region replication, processing job Region, and the applicable data transfer policies.
- Compare observed feature schema to the approved training contract and validation errors.
- Measure file-system shared read throughput and worker saturation against available FSx options.
Explanation
Correct Answer
B:This evidence directly tests the reported behavior: Inspect bucket Region, cross-Region replication, processing job Region, and the applicable data transfer policies. For this case, an international organization must train a model using regional customer data without copying identifiable records into another AWS Region. The results tell the team whether to apply the targeted change: Keep raw customer data and processing resources in the permitted AWS Region with restrictive transfer controls.
Incorrect Answers
A:That diagnostic measures a different AWS ML behavior: A lender already using SageMaker Clarify has much fewer approved loans from one demographic subgroup and needs a measured dataset bias check before modeling. It cannot establish the main condition: An international organization must train a model using regional customer data without copying identifiable records into another AWS Region. The decisive evidence for this case is: Inspect bucket Region, cross-Region replication, processing job Region, and the applicable data transfer policies.
C:That diagnostic measures a different AWS ML behavior: A feature producer changes a numeric transaction count to a string, causing model inference preprocessing to fail despite successful S3 ingestion. It cannot establish the main condition: An international organization must train a model using regional customer data without copying identifiable records into another AWS Region. The decisive evidence for this case is: Inspect bucket Region, cross-Region replication, processing job Region, and the applicable data transfer policies.
D:That diagnostic measures a different AWS ML behavior: A training job repeatedly reads a shared block of feature matrices and needs much faster parallel data access than the current single-volume setup. It cannot establish the main condition: An international organization must train a model using regional customer data without copying identifiable records into another AWS Region. The decisive evidence for this case is: Inspect bucket Region, cross-Region replication, processing job Region, and the applicable data transfer policies.
AWS Certified Machine Learning Engineer - Associate MLA-C01 Practice Tests