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A churn model reaches 0.99 AUC on its validation split but performs close to random in production. The engineer reviews how each input feature is produced: the billing system writes account_closure_reason when an account is cancelled, the activity service recomputes days_since_last_login every night, the billing system writes monthly_charge on each invoice, and the ticketing service aggregates support_tickets_90d over a rolling window.
Which feature should be removed from the training set?
Answer it and read the explanation →About the MLA-C01 exam
- Length
- 130 minutes
- Questions
- 65 questions (50 scored, 15 unscored)
- Passing score
- 720 on a 100 to 1,000 scale
- Price
- $150 USD
- Question types
- Multiple choice, multiple response, ordering, matching
- Where you take it
- Pearson VUE test center or online proctored
- Valid for
- 3 years
- Languages
- English, Japanese, Korean, Simplified Chinese
The English MLA-C01 exam is offered through September 28, 2026. MLA-C02 beta registration opened September 1, 2026.
Checked against the provider's certification page and exam guide on 2026-09-15. Providers change fees and formats; confirm before you book. Register for the official exam ↗
What the exam covers
130 minutes, 65 questions. AWS uses scaled scoring with a minimum passing score of 720.
- Data Preparation for Machine Learning (ML)28%
- ML Model Development26%
- Deployment and Orchestration of ML Workflows22%
- ML Solution Monitoring, Maintenance, and Security24%
Weights are from the provider's published exam guide.
Who this is for. Engineers implementing and operating machine learning workloads on AWS.
How to study. Trace a model from training data to production. Be able to explain leakage, deployment tradeoffs, drift detection, and access control.
Our bank has 18 questions and uses single-answer multiple choice. Official exams may use additional formats. This is an independent practice set.
All 18 practice questions
Open a question to try it and read the reasoning. Related questions may also appear in other relevant tracks.
Data Preparation for Machine Learning (ML) 5
- Which feature should be removed from the training set?medium
- Which split transform produces a validation estimate that reflects production performance?medium
- Which approach keeps the definitions consistent and serves the endpoint with the LEAST ongoing maintenance?medium
- Which read path meets both requirements?medium
- Which create_dataset option removes the future information from the training features?hard
ML Model Development 4
Deployment and Orchestration of ML Workflows 4
ML Solution Monitoring, Maintenance, and Security 5
- Which measurement should the team make FIRST?medium
- Which orchestrator meets these requirements with the LEAST added operational surface?medium
- Which approach meets the requirement?medium
- Which Model Monitor schedule will detect the degradation?hard
- Which change repairs the cause across every consumer?medium
Common questions
What can I practice for AWS Machine Learning Engineer Associate?
18 independent single-answer practice questions covering selected topics: Data Preparation for Machine Learning (ML), ML Model Development, Deployment and Orchestration of ML Workflows, ML Solution Monitoring, Maintenance, and Security. Each includes an explanation and source link.
Is this an official certification or exam dump?
No. AI CertArena writes independent practice scenarios. We are not affiliated with or endorsed by the exam providers, and we do not publish live exam questions.
Does my practice score predict an exam pass?
No. Your score is the percentage correct in this practice set, including skipped questions. Our 80% practice goal is a study target, not an official cut score or calibrated pass prediction.
How should I use this practice bank?
Try a short set, review the explanation for every miss, and repeat those questions later. Use the official exam guide to check topics that this starter bank does not yet cover.
Can I save and share my progress?
Sign in with Google to keep completed attempts and topic evaluations across devices. You can sign in after finishing a set and it still counts. You can also choose to publish a saved practice result and download an image to share. A practice badge is not a vendor credential.