The correct answer is to use Amazon CloudWatch metrics, CloudWatch Logs, and AWS Glue job bookmarks together to monitor AWS Glue job performance and troubleshoot failures. CloudWatch metrics track key performance indicators like job duration, data throughput, and memory utilization, while CloudWatch Logs capture detailed execution logs for debugging errors and failed stages. Glue job bookmarks complement these by tracking processed data state, enabling incremental processing and preventing duplicate reprocessing during retries. On the AWS Certified Machine Learning Specialty MLS-C01 exam, this question tests your understanding of operational monitoring within the ML pipeline, often appearing as a multi-select scenario where you must distinguish between monitoring tools and triggering or querying services. A common trap is selecting Amazon Athena for log analysis or S3 Events for job triggers, but remember: Athena is for ad-hoc querying, not real-time monitoring, and S3 Events initiate jobs rather than monitor them. Memory tip: think “Metrics, Logs, Bookmarks” as the three pillars of Glue observability.
MLS-C01 Data Engineering Practice Question
This MLS-C01 practice question tests your understanding of data engineering. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
A company uses AWS Glue to run ETL jobs. The data engineer wants to monitor job performance and troubleshoot failures. Which THREE AWS services or features should they use together? (Choose three.)
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
AWS Glue job bookmarks
Correct options: A, C, E. CloudWatch Logs stores Glue job logs, CloudWatch metrics tracks job performance metrics, and Glue job bookmarks track processed data. Option B (Athena) is for querying, not monitoring. Option D (S3 Events) can trigger jobs but not monitor them.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✓
AWS Glue job bookmarks
Why this is correct
Job bookmarks track processed data and help identify failures.
Related concept
Read the scenario before looking for a memorised answer.
✗
Amazon S3 Event Notifications
Why it's wrong here
S3 events can trigger Glue jobs but do not help monitor job performance.
✗
Amazon Athena
Why it's wrong here
Athena is an interactive query service, not a monitoring tool.
✓
Amazon CloudWatch Logs
Why this is correct
Glue jobs send logs to CloudWatch Logs for troubleshooting.
Related concept
Read the scenario before looking for a memorised answer.
✓
Amazon CloudWatch metrics
Why this is correct
CloudWatch metrics provide job duration, DPU usage, and other performance data.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Detailed technical explanation
How to think about this question
This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.
KKey Concepts to Remember
Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.
Use explanations to understand the rule behind the answer.
TExam Day Tips
→Underline the problem statement mentally.
→Watch for words such as best, first, most likely and least administrative effort.
→Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A media company stores terabytes of video archives that are accessed once a year for audit purposes. Moving these objects to a cold storage tier (Azure Archive, S3 Glacier, or Google Nearline) costs a fraction of hot storage. Questions like this test whether you understand storage tiers, access frequency tradeoffs, and retrieval latency requirements.
What to study next
Got this wrong? Here's your next step.
Identify which MLS-C01 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
Data Engineering — This question tests Data Engineering — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: AWS Glue job bookmarks — Correct options: A, C, E. CloudWatch Logs stores Glue job logs, CloudWatch metrics tracks job performance metrics, and Glue job bookmarks track processed data. Option B (Athena) is for querying, not monitoring. Option D (S3 Events) can trigger jobs but not monitor them.
What should I do if I get this MLS-C01 question wrong?
Identify which MLS-C01 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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This MLS-C01 practice question is part of Courseiva's free Amazon Web Services certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the MLS-C01 exam.
Question Discussion
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