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Amazon AWS Certified Machine Learning Engineer - Associate MLA-C01 Practice Test 3
Question 20
A data-science incident must be diagnosed without guessing: A vision team repeatedly reads millions of images from S3 during high-throughput distributed training and requires filesystem semantics with parallel read performance. Which diagnostic observation most directly evaluates the reported condition?
- Inspect AWS Glue JDBC connection reachability, selected source table schema, and ETL job runs.
- Review the producer Kafka protocol compatibility needs and Amazon MSK broker connectivity.
- Inspect Kinesis Data Streams shard sequence numbers and retained records within the configured retention window.
- Measure aggregate training-worker read throughput and FSx for Lustre repository import status.
Explanation
Correct Answer
D:This evidence directly tests the reported behavior: Measure aggregate training-worker read throughput and FSx for Lustre repository import status. For this case, a vision team repeatedly reads millions of images from S3 during high-throughput distributed training and requires filesystem semantics with parallel read performance. The results tell the team whether to apply the targeted change: Use Amazon FSx for Lustre with an appropriate S3 data repository association and training access configuration.
Incorrect Answers
A:That diagnostic measures a different AWS ML behavior: A team needs a scheduled extraction of selected records from Amazon RDS into S3 for modeling while applying typed transformations and recording job history. It cannot establish the main condition: A vision team repeatedly reads millions of images from S3 during high-throughput distributed training and requires filesystem semantics with parallel read performance. The decisive evidence for this case is: Measure aggregate training-worker read throughput and FSx for Lustre repository import status.
B:That diagnostic measures a different AWS ML behavior: An enterprise already uses Apache Kafka producers and requires managed Kafka brokers for an AWS-based ML event pipeline without rewriting those clients for Kinesis. It cannot establish the main condition: A vision team repeatedly reads millions of images from S3 during high-throughput distributed training and requires filesystem semantics with parallel read performance. The decisive evidence for this case is: Measure aggregate training-worker read throughput and FSx for Lustre repository import status.
C:That diagnostic measures a different AWS ML behavior: A fraud team needs to replay an ordered stream of card authorization events for a new consumer without asking the card processor to send the original events again. It cannot establish the main condition: A vision team repeatedly reads millions of images from S3 during high-throughput distributed training and requires filesystem semantics with parallel read performance. The decisive evidence for this case is: Measure aggregate training-worker read throughput and FSx for Lustre repository import status.
Question 21
Before making a production change, an engineer must investigate this condition: A data scientist discovers that yesterday's feature extraction changed the raw CSV underlying a model run and must recover the exact original S3 object revision. Which diagnostic observation most directly evaluates the reported condition?
- Inspect S3 object version IDs and recorded training manifest object references.
- Compare EBS read IOPS and latency to the volume's configured IOPS provisioned limit.
- Compare measured upload throughput using an S3 Transfer Acceleration endpoint versus the regional endpoint.
- Review the producer Kafka protocol compatibility needs and Amazon MSK broker connectivity.
Explanation
Correct Answer
A:This evidence directly tests the reported behavior: Inspect S3 object version IDs and recorded training manifest object references. For this case, a data scientist discovers that yesterday's feature extraction changed the raw CSV underlying a model run and must recover the exact original S3 object revision. The results tell the team whether to apply the targeted change: Enable S3 Versioning and record the exact source object version IDs in the experiment manifest.
Incorrect Answers
B:That diagnostic measures a different AWS ML behavior: A GPU training instance repeatedly reads a random-access local index and standard EBS storage saturates on small I/O requests during preprocessing. It cannot establish the main condition: A data scientist discovers that yesterday's feature extraction changed the raw CSV underlying a model run and must recover the exact original S3 object revision. The decisive evidence for this case is: Inspect S3 object version IDs and recorded training manifest object references.
C:That diagnostic measures a different AWS ML behavior: A research partner uploads multi-gigabyte labeled video datasets to a distant AWS Region and the normal S3 transfer route underperforms. It cannot establish the main condition: A data scientist discovers that yesterday's feature extraction changed the raw CSV underlying a model run and must recover the exact original S3 object revision. The decisive evidence for this case is: Inspect S3 object version IDs and recorded training manifest object references.
D:That diagnostic measures a different AWS ML behavior: An enterprise already uses Apache Kafka producers and requires managed Kafka brokers for an AWS-based ML event pipeline without rewriting those clients for Kinesis. It cannot establish the main condition: A data scientist discovers that yesterday's feature extraction changed the raw CSV underlying a model run and must recover the exact original S3 object revision. The decisive evidence for this case is: Inspect S3 object version IDs and recorded training manifest object references.
Question 22
The ML operations team needs direct evidence about this situation: A team needs a scheduled extraction of selected records from Amazon RDS into S3 for modeling while applying typed transformations and recording job history. Which diagnostic observation most directly evaluates the reported condition?
- Compare EBS read IOPS and latency to the volume's configured IOPS provisioned limit.
- Inspect AWS Glue JDBC connection reachability, selected source table schema, and ETL job runs.
- Check Amazon Data Firehose delivery-stream error metrics and S3 delivery object timestamps.
- Measure aggregate training-worker read throughput and FSx for Lustre repository import status.
Explanation
Correct Answer
B:This evidence directly tests the reported behavior: Inspect AWS Glue JDBC connection reachability, selected source table schema, and ETL job runs. For this case, a team needs a scheduled extraction of selected records from Amazon RDS into S3 for modeling while applying typed transformations and recording job history. The results tell the team whether to apply the targeted change: Configure an AWS Glue ETL job with an approved JDBC connection and S3 output dataset.
Incorrect Answers
A:That diagnostic measures a different AWS ML behavior: A GPU training instance repeatedly reads a random-access local index and standard EBS storage saturates on small I/O requests during preprocessing. It cannot establish the main condition: A team needs a scheduled extraction of selected records from Amazon RDS into S3 for modeling while applying typed transformations and recording job history. The decisive evidence for this case is: Inspect AWS Glue JDBC connection reachability, selected source table schema, and ETL job runs.
C:That diagnostic measures a different AWS ML behavior: A telemetry pipeline receives continuously arriving application events and must land compressed records in S3 without a custom long-running consumer service. It cannot establish the main condition: A team needs a scheduled extraction of selected records from Amazon RDS into S3 for modeling while applying typed transformations and recording job history. The decisive evidence for this case is: Inspect AWS Glue JDBC connection reachability, selected source table schema, and ETL job runs.
D:That diagnostic measures a different AWS ML behavior: A vision team repeatedly reads millions of images from S3 during high-throughput distributed training and requires filesystem semantics with parallel read performance. It cannot establish the main condition: A team needs a scheduled extraction of selected records from Amazon RDS into S3 for modeling while applying typed transformations and recording job history. The decisive evidence for this case is: Inspect AWS Glue JDBC connection reachability, selected source table schema, and ETL job runs.
Question 23
A data-science incident must be diagnosed without guessing: A merchant needs downstream features updated when items in a DynamoDB inventory table change, without polling and scanning the entire table each minute. Which diagnostic observation most directly evaluates the reported condition?
- Measure aggregate training-worker read throughput and FSx for Lustre repository import status.
- Inspect DynamoDB Streams records and sequence numbers for actual item modifications.
- Compare measured upload throughput using an S3 Transfer Acceleration endpoint versus the regional endpoint.
- Review the producer Kafka protocol compatibility needs and Amazon MSK broker connectivity.
Explanation
Correct Answer
B:This evidence directly tests the reported behavior: Inspect DynamoDB Streams records and sequence numbers for actual item modifications. For this case, a merchant needs downstream features updated when items in a DynamoDB inventory table change, without polling and scanning the entire table each minute. The results tell the team whether to apply the targeted change: Enable DynamoDB Streams and consume the relevant change records with an authorized processing integration.
Incorrect Answers
A:That diagnostic measures a different AWS ML behavior: A vision team repeatedly reads millions of images from S3 during high-throughput distributed training and requires filesystem semantics with parallel read performance. It cannot establish the main condition: A merchant needs downstream features updated when items in a DynamoDB inventory table change, without polling and scanning the entire table each minute. The decisive evidence for this case is: Inspect DynamoDB Streams records and sequence numbers for actual item modifications.
C:That diagnostic measures a different AWS ML behavior: A research partner uploads multi-gigabyte labeled video datasets to a distant AWS Region and the normal S3 transfer route underperforms. It cannot establish the main condition: A merchant needs downstream features updated when items in a DynamoDB inventory table change, without polling and scanning the entire table each minute. The decisive evidence for this case is: Inspect DynamoDB Streams records and sequence numbers for actual item modifications.
D:That diagnostic measures a different AWS ML behavior: An enterprise already uses Apache Kafka producers and requires managed Kafka brokers for an AWS-based ML event pipeline without rewriting those clients for Kinesis. It cannot establish the main condition: A merchant needs downstream features updated when items in a DynamoDB inventory table change, without polling and scanning the entire table each minute. The decisive evidence for this case is: Inspect DynamoDB Streams records and sequence numbers for actual item modifications.
Question 24
Before making a production change, an engineer must investigate this condition: An enterprise already uses Apache Kafka producers and requires managed Kafka brokers for an AWS-based ML event pipeline without rewriting those clients for Kinesis. Which diagnostic observation most directly evaluates the reported condition?
- Measure aggregate training-worker read throughput and FSx for Lustre repository import status.
- Compare measured upload throughput using an S3 Transfer Acceleration endpoint versus the regional endpoint.
- Review the producer Kafka protocol compatibility needs and Amazon MSK broker connectivity.
- Inspect S3 object creation events and EventBridge rule filtering for the source bucket and prefix.
Explanation
Correct Answer
C:This evidence directly tests the reported behavior: Review the producer Kafka protocol compatibility needs and Amazon MSK broker connectivity. For this case, an enterprise already uses Apache Kafka producers and requires managed Kafka brokers for an AWS-based ML event pipeline without rewriting those clients for Kinesis. The results tell the team whether to apply the targeted change: Deploy appropriately configured Amazon MSK with secure broker access and existing Kafka-topic conventions.
Incorrect Answers
A:That diagnostic measures a different AWS ML behavior: A vision team repeatedly reads millions of images from S3 during high-throughput distributed training and requires filesystem semantics with parallel read performance. It cannot establish the main condition: An enterprise already uses Apache Kafka producers and requires managed Kafka brokers for an AWS-based ML event pipeline without rewriting those clients for Kinesis. The decisive evidence for this case is: Review the producer Kafka protocol compatibility needs and Amazon MSK broker connectivity.
B:That diagnostic measures a different AWS ML behavior: A research partner uploads multi-gigabyte labeled video datasets to a distant AWS Region and the normal S3 transfer route underperforms. It cannot establish the main condition: An enterprise already uses Apache Kafka producers and requires managed Kafka brokers for an AWS-based ML event pipeline without rewriting those clients for Kinesis. The decisive evidence for this case is: Review the producer Kafka protocol compatibility needs and Amazon MSK broker connectivity.
D:That diagnostic measures a different AWS ML behavior: A finance lake receives one S3 object per nightly batch and wants ingestion validation to start when the specific input prefix receives a complete new object. It cannot establish the main condition: An enterprise already uses Apache Kafka producers and requires managed Kafka brokers for an AWS-based ML event pipeline without rewriting those clients for Kinesis. The decisive evidence for this case is: Review the producer Kafka protocol compatibility needs and Amazon MSK broker connectivity.
Question 25
The ML operations team needs direct evidence about this situation: An online fraud API needs current user feature values in milliseconds, while model training needs historical feature records from the same definitions. Which diagnostic observation most directly evaluates the reported condition?
- Compare Athena bytes scanned for the selected columns in CSV and Parquet datasets.
- Inspect SageMaker Feature Store online-record lookups and offline-store ingestion lag.
- Compare measured upload throughput using an S3 Transfer Acceleration endpoint versus the regional endpoint.
- Review the producer Kafka protocol compatibility needs and Amazon MSK broker connectivity.
Explanation
Correct Answer
B:This evidence directly tests the reported behavior: Inspect SageMaker Feature Store online-record lookups and offline-store ingestion lag. For this case, an online fraud API needs current user feature values in milliseconds, while model training needs historical feature records from the same definitions. The results tell the team whether to apply the targeted change: Configure SageMaker Feature Store with appropriate online and offline storage for shared feature groups.
Incorrect Answers
A:That diagnostic measures a different AWS ML behavior: An insurance company trains on years of wide structured claims data in Amazon S3, but analysts repeatedly scan only six columns and spend too much time reading CSV files. It cannot establish the main condition: An online fraud API needs current user feature values in milliseconds, while model training needs historical feature records from the same definitions. The decisive evidence for this case is: Inspect SageMaker Feature Store online-record lookups and offline-store ingestion lag.
C:That diagnostic measures a different AWS ML behavior: A research partner uploads multi-gigabyte labeled video datasets to a distant AWS Region and the normal S3 transfer route underperforms. It cannot establish the main condition: An online fraud API needs current user feature values in milliseconds, while model training needs historical feature records from the same definitions. The decisive evidence for this case is: Inspect SageMaker Feature Store online-record lookups and offline-store ingestion lag.
D:That diagnostic measures a different AWS ML behavior: An enterprise already uses Apache Kafka producers and requires managed Kafka brokers for an AWS-based ML event pipeline without rewriting those clients for Kinesis. It cannot establish the main condition: An online fraud API needs current user feature values in milliseconds, while model training needs historical feature records from the same definitions. The decisive evidence for this case is: Inspect SageMaker Feature Store online-record lookups and offline-store ingestion lag.
Question 26
A data-science incident must be diagnosed without guessing: A remote sensor network periodically uploads 30 GB compressed datasets, and a failed connection currently forces a full restart of each upload. Which diagnostic observation most directly evaluates the reported condition?
- Review the producer Kafka protocol compatibility needs and Amazon MSK broker connectivity.
- Measure aggregate training-worker read throughput and FSx for Lustre repository import status.
- Inspect incomplete multipart upload sessions and uploaded part ETags for the target S3 key.
- Check Amazon Data Firehose delivery-stream error metrics and S3 delivery object timestamps.
Explanation
Correct Answer
C:This evidence directly tests the reported behavior: Inspect incomplete multipart upload sessions and uploaded part ETags for the target S3 key. For this case, a remote sensor network periodically uploads 30 GB compressed datasets, and a failed connection currently forces a full restart of each upload. The results tell the team whether to apply the targeted change: Use S3 multipart upload with checkpointed part identifiers and abort rules for abandoned attempts.
Incorrect Answers
A:That diagnostic measures a different AWS ML behavior: An enterprise already uses Apache Kafka producers and requires managed Kafka brokers for an AWS-based ML event pipeline without rewriting those clients for Kinesis. It cannot establish the main condition: A remote sensor network periodically uploads 30 GB compressed datasets, and a failed connection currently forces a full restart of each upload. The decisive evidence for this case is: Inspect incomplete multipart upload sessions and uploaded part ETags for the target S3 key.
B:That diagnostic measures a different AWS ML behavior: A vision team repeatedly reads millions of images from S3 during high-throughput distributed training and requires filesystem semantics with parallel read performance. It cannot establish the main condition: A remote sensor network periodically uploads 30 GB compressed datasets, and a failed connection currently forces a full restart of each upload. The decisive evidence for this case is: Inspect incomplete multipart upload sessions and uploaded part ETags for the target S3 key.
D:That diagnostic measures a different AWS ML behavior: A telemetry pipeline receives continuously arriving application events and must land compressed records in S3 without a custom long-running consumer service. It cannot establish the main condition: A remote sensor network periodically uploads 30 GB compressed datasets, and a failed connection currently forces a full restart of each upload. The decisive evidence for this case is: Inspect incomplete multipart upload sessions and uploaded part ETags for the target S3 key.
Question 27
Before making a production change, an engineer must investigate this condition: A GPU training instance repeatedly reads a random-access local index and standard EBS storage saturates on small I/O requests during preprocessing. Which diagnostic observation most directly evaluates the reported condition?
- Inspect AWS Glue JDBC connection reachability, selected source table schema, and ETL job runs.
- Compare EBS read IOPS and latency to the volume's configured IOPS provisioned limit.
- Inspect training mount permissions and concurrent file access for a shared Amazon EFS filesystem.
- Inspect S3 object version IDs and recorded training manifest object references.
Explanation
Correct Answer
B:This evidence directly tests the reported behavior: Compare EBS read IOPS and latency to the volume's configured IOPS provisioned limit. For this case, a GPU training instance repeatedly reads a random-access local index and standard EBS storage saturates on small I/O requests during preprocessing. The results tell the team whether to apply the targeted change: Choose and provision an EBS volume type and IOPS budget suited to the observed random I/O requirement.
Incorrect Answers
A:That diagnostic measures a different AWS ML behavior: A team needs a scheduled extraction of selected records from Amazon RDS into S3 for modeling while applying typed transformations and recording job history. It cannot establish the main condition: A GPU training instance repeatedly reads a random-access local index and standard EBS storage saturates on small I/O requests during preprocessing. The decisive evidence for this case is: Compare EBS read IOPS and latency to the volume's configured IOPS provisioned limit.
C:That diagnostic measures a different AWS ML behavior: Several SageMaker training workers require concurrent access to a POSIX directory tree containing many small training files instead of manually syncing copies into every container. It cannot establish the main condition: A GPU training instance repeatedly reads a random-access local index and standard EBS storage saturates on small I/O requests during preprocessing. The decisive evidence for this case is: Compare EBS read IOPS and latency to the volume's configured IOPS provisioned limit.
D:That diagnostic measures a different AWS ML behavior: A data scientist discovers that yesterday's feature extraction changed the raw CSV underlying a model run and must recover the exact original S3 object revision. It cannot establish the main condition: A GPU training instance repeatedly reads a random-access local index and standard EBS storage saturates on small I/O requests during preprocessing. The decisive evidence for this case is: Compare EBS read IOPS and latency to the volume's configured IOPS provisioned limit.
Question 28
The ML operations team needs direct evidence about this situation: A finance lake receives one S3 object per nightly batch and wants ingestion validation to start when the specific input prefix receives a complete new object. Which diagnostic observation most directly evaluates the reported condition?
- Check Amazon Data Firehose delivery-stream error metrics and S3 delivery object timestamps.
- Inspect S3 object creation events and EventBridge rule filtering for the source bucket and prefix.
- Review the producer Kafka protocol compatibility needs and Amazon MSK broker connectivity.
- Measure aggregate training-worker read throughput and FSx for Lustre repository import status.
Explanation
Correct Answer
B:This evidence directly tests the reported behavior: Inspect S3 object creation events and EventBridge rule filtering for the source bucket and prefix. For this case, a finance lake receives one S3 object per nightly batch and wants ingestion validation to start when the specific input prefix receives a complete new object. The results tell the team whether to apply the targeted change: Route selected S3 object events through EventBridge to an idempotent validation workflow.
Incorrect Answers
A:That diagnostic measures a different AWS ML behavior: A telemetry pipeline receives continuously arriving application events and must land compressed records in S3 without a custom long-running consumer service. It cannot establish the main condition: A finance lake receives one S3 object per nightly batch and wants ingestion validation to start when the specific input prefix receives a complete new object. The decisive evidence for this case is: Inspect S3 object creation events and EventBridge rule filtering for the source bucket and prefix.
C:That diagnostic measures a different AWS ML behavior: An enterprise already uses Apache Kafka producers and requires managed Kafka brokers for an AWS-based ML event pipeline without rewriting those clients for Kinesis. It cannot establish the main condition: A finance lake receives one S3 object per nightly batch and wants ingestion validation to start when the specific input prefix receives a complete new object. The decisive evidence for this case is: Inspect S3 object creation events and EventBridge rule filtering for the source bucket and prefix.
D:That diagnostic measures a different AWS ML behavior: A vision team repeatedly reads millions of images from S3 during high-throughput distributed training and requires filesystem semantics with parallel read performance. It cannot establish the main condition: A finance lake receives one S3 object per nightly batch and wants ingestion validation to start when the specific input prefix receives a complete new object. The decisive evidence for this case is: Inspect S3 object creation events and EventBridge rule filtering for the source bucket and prefix.
Question 29
A postdeployment test assesses this specific remediation: Partition the records by date and store compressed Parquet objects in the authorized S3 location. This relates to a situation where an insurance company trains on years of wide structured claims data in Amazon S3, but analysts repeatedly scan only six columns and spend too much time reading CSV files. What outcome should the team look for if that change succeeds?
- Updated item attributes can flow into downstream feature processing with lower polling overhead.
- Workers share a consistent POSIX file namespace throughout processing.
- Column pruning and compression reduce input read and query cost for the selected fields.
- Existing Kafka producers can send events to a managed Kafka infrastructure.
Explanation
Correct Answer
C:This is the expected observable result: Column pruning and compression reduce input read and query cost for the selected fields. It follows when engineers partition the records by date and store compressed Parquet objects in the authorized S3 location. The team must still consider the limitation: Converting to Parquet does not eliminate the need to choose sensible partitions or prevent small-file overhead.
Incorrect Answers
A:That result concerns a merchant needs downstream features updated when items in a DynamoDB inventory table change, without polling and scanning the entire table each minute. It would not demonstrate that column pruning and compression reduce input read and query cost for the selected fields.
B:That result concerns several SageMaker training workers require concurrent access to a POSIX directory tree containing many small training files instead of manually syncing copies into every container. It would not demonstrate that column pruning and compression reduce input read and query cost for the selected fields.
D:That result concerns an enterprise already uses Apache Kafka producers and requires managed Kafka brokers for an AWS-based ML event pipeline without rewriting those clients for Kinesis. It would not demonstrate that column pruning and compression reduce input read and query cost for the selected fields.
Question 30
After a planned change, the release team needs evidence of the expected outcome. The change is: Ingest events into Kinesis Data Streams with sufficient shards and retention for consumer replay. This relates to a situation where a fraud team needs to replay an ordered stream of card authorization events for a new consumer without asking the card processor to send the original events again. What outcome should the team look for if that change succeeds?
- Existing Kafka producers can send events to a managed Kafka infrastructure.
- New qualifying source objects trigger the downstream ingestion check automatically.
- Workers share a consistent POSIX file namespace throughout processing.
- Independent consumers can read retained stream records and reprocess events during the retention period.
Explanation
Correct Answer
D:This is the expected observable result: Independent consumers can read retained stream records and reprocess events during the retention period. It follows when engineers ingest events into Kinesis Data Streams with sufficient shards and retention for consumer replay. The team must still consider the limitation: Retention and shard capacity are bounded; a delivery-only destination is not a substitute for replayable streams.
Incorrect Answers
A:That result concerns an enterprise already uses Apache Kafka producers and requires managed Kafka brokers for an AWS-based ML event pipeline without rewriting those clients for Kinesis. It would not demonstrate that independent consumers can read retained stream records and reprocess events during the retention period.
B:That result concerns a finance lake receives one S3 object per nightly batch and wants ingestion validation to start when the specific input prefix receives a complete new object. It would not demonstrate that independent consumers can read retained stream records and reprocess events during the retention period.
C:That result concerns several SageMaker training workers require concurrent access to a POSIX directory tree containing many small training files instead of manually syncing copies into every container. It would not demonstrate that independent consumers can read retained stream records and reprocess events during the retention period.
AWS Certified Machine Learning Engineer - Associate MLA-C01 Practice Tests