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Question 648 of 1,755

Data Engineering →mediumMultiple ChoiceObjective-mapped

Quick Answer

The answer is to set the MaxConcurrentRuns property to 3. This is correct because the error “Job run exceeds max concurrent runs limit” occurs when the MaxConcurrentRuns value is set too low—in this case, 1—which explicitly prevents parallel executions of the same Glue job. By increasing this property to 3, you allow up to three simultaneous runs, resolving the concurrency bottleneck. On the AWS Certified Machine Learning Specialty MLS-C01 exam, this scenario tests your understanding of Glue job configuration parameters, often disguised as a CloudFormation troubleshooting question. A common trap is confusing MaxRetries (which controls how many times a failed run is retried) with MaxConcurrentRuns; remember that retries are sequential, not parallel. For a quick memory tip: think “MaxConcurrentRuns = parallel lanes on a highway; MaxRetries = how many times you can restart the same stalled car.”

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.

Exhibit

Refer to the exhibit.

CloudFormation template snippet:

Resources:
  MyGlueJob:
    Type: AWS::Glue::Job
    Properties:
      Command:
        Name: glueetl
        ScriptLocation: s3://my-bucket/scripts/etl.py
        PythonVersion: "3"
      DefaultArguments:
        --TempDir: s3://my-bucket/temp/
        --job-bookmark-option: job-bookmark-enable
      ExecutionProperty:
        MaxConcurrentRuns: 1
      MaxRetries: 0
      Name: my-glue-job
      Role: arn:aws:iam::123456789012:role/GlueServiceRole

The Glue job my-glue-job fails after a few successful runs. The error log shows 'Job run exceeds max concurrent runs limit'. The CloudFormation template is shown in the exhibit. What change should be made to allow multiple runs to execute concurrently?

Question 1mediummultiple choice

Full question →

Exhibit

Refer to the exhibit.

CloudFormation template snippet:

Resources:
  MyGlueJob:
    Type: AWS::Glue::Job
    Properties:
      Command:
        Name: glueetl
        ScriptLocation: s3://my-bucket/scripts/etl.py
        PythonVersion: "3"
      DefaultArguments:
        --TempDir: s3://my-bucket/temp/
        --job-bookmark-option: job-bookmark-enable
      ExecutionProperty:
        MaxConcurrentRuns: 1
      MaxRetries: 0
      Name: my-glue-job
      Role: arn:aws:iam::123456789012:role/GlueServiceRole

A
Change the IAM role to one with more permissions
Why wrong: Permissions do not affect concurrency limits.
B
Increase the MaxRetries property to 3
Why wrong: MaxRetries controls how many times a failed job is retried, not concurrency.
C
Remove the --job-bookmark-option argument
Why wrong: Job bookmarks track state, not concurrency.
D
Set the MaxConcurrentRuns property to 3
This allows up to 3 concurrent job runs.

Full breakdown with real-world context →

Answer choices

Why each option matters

Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.

Correct answer & explanation

✓

Set the MaxConcurrentRuns property to 3

The 'MaxConcurrentRuns' is set to 1, which prevents parallel executions. Setting it to a higher value (e.g., 3) allows concurrent runs. MaxRetries is for retry count, not concurrency. Role and TempDir are not relevant.

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.

✗
Change the IAM role to one with more permissions
Why it's wrong here
Permissions do not affect concurrency limits.
✗
Increase the MaxRetries property to 3
Why it's wrong here
MaxRetries controls how many times a failed job is retried, not concurrency.
✗
Remove the --job-bookmark-option argument
Why it's wrong here
Job bookmarks track state, not concurrency.
✓
Set the MaxConcurrentRuns property to 3
Why this is correct
This allows up to 3 concurrent job runs.
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 company's IT admin needs to give a contractor read-only access to production logs without sharing account credentials. Using role-based access control (RBAC) and temporary scoped permissions — not a permanent shared password — is the correct pattern. Questions like this test whether you can apply least-privilege access across cloud identity services.

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.

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Use these pages to review the topic behind this question. This is how one missed question becomes focused revision.

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FAQ

Questions learners often ask

What does this MLS-C01 question test?

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: Set the MaxConcurrentRuns property to 3 — The 'MaxConcurrentRuns' is set to 1, which prevents parallel executions. Setting it to a higher value (e.g., 3) allows concurrent runs. MaxRetries is for retry count, not concurrency. Role and TempDir are not relevant.

What should I do if I get this MLS-C01 question wrong?

What is the key concept behind this question?

Read the scenario before looking for a memorised answer.

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Last reviewed: Jun 20, 2026

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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.