The answer is to request a service quota increase for concurrent executions of Standard Workflows. This is correct because the StateMachineExecutionLimitExceeded error occurs when the account-level limit of 1,000 open executions per Standard state machine is breached, not from Lambda concurrency or execution timeouts. On the AWS Certified Data Engineer Associate DEA-C01 exam, this question tests your understanding of Step Functions service quotas versus Lambda limits, and a common trap is confusing the two or assuming Express Workflows can replace Standard ones—but Express has a 5-minute max duration, which would break the 15-minute SLA. Remember that Standard Workflows are designed for long-running, durable orchestrations, while Express is for high-volume, short-lived tasks. Memory tip: think “Standard = steady, long-haul; Express = quick, bursty”—and when you hit a quota wall, always check the service limits first.
DEA-C01 Data Operations and Support Practice Question
This DEA-C01 practice question tests your understanding of data operations and support. 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 financial services company runs a critical data pipeline using AWS Step Functions to orchestrate multiple AWS Lambda functions and AWS Glue jobs. The pipeline processes transaction data and must complete within 15 minutes to meet a service-level agreement (SLA). Recently, the pipeline has been failing intermittently with a 'StateMachineExecutionLimitExceeded' error. The Step Functions state machine is configured with a Standard type. The company has a single state machine that runs on demand. The error occurs when multiple requests are submitted simultaneously. What should the team do to prevent this error?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Request a service quota increase for concurrent executions of Standard Workflows.
Option D is correct because Standard Workflows have a limit of 1 million state transitions and a maximum execution duration of 1 year, but they also have a limit of 1,000 open executions per state machine. However, the error 'StateMachineExecutionLimitExceeded' indicates the account-level limit for concurrent executions is exceeded. The default limit for Standard Workflows is 1,000 executions per state machine. To handle spikes, the team should request a limit increase. Option A is wrong because Express Workflows are designed for high-volume event-driven workloads and have different limits (e.g., 5-minute max duration), which may not meet the SLA. Option B is wrong because increasing the timeout does not affect execution limits. Option C is wrong because Lambda concurrency limits are separate from Step Functions execution limits.
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.
✗
Increase the state machine execution timeout to 30 minutes.
Why it's wrong here
Timeout changes affect execution duration, not the number of concurrent executions allowed.
✗
Switch the state machine type to Express Workflow to handle higher throughput.
Why it's wrong here
Express Workflows have a maximum duration of 5 minutes, which may not be sufficient for the pipeline.
✓
Request a service quota increase for concurrent executions of Standard Workflows.
Why this is correct
The error is due to hitting the account-level limit for concurrent Standard Workflow executions; a quota increase resolves it.
Related concept
Read the scenario before looking for a memorised answer.
✗
Increase the Lambda function reserved concurrency to 100.
Why it's wrong here
Lambda concurrency limits do not affect Step Functions execution limits.
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 startup's cloud architect reviews their monthly bill and notices costs are higher than expected for a long-running batch job. Switching from on-demand instances to Reserved Instances — or using Spot/Preemptible VMs — can reduce compute costs by up to 72 %. Questions like this test whether you understand the tradeoffs between commitment, flexibility, and cost across cloud pricing models.
What to study next
Got this wrong? Here's your next step.
Identify which DEA-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 Operations and Support — This question tests Data Operations and Support — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Request a service quota increase for concurrent executions of Standard Workflows. — Option D is correct because Standard Workflows have a limit of 1 million state transitions and a maximum execution duration of 1 year, but they also have a limit of 1,000 open executions per state machine. However, the error 'StateMachineExecutionLimitExceeded' indicates the account-level limit for concurrent executions is exceeded. The default limit for Standard Workflows is 1,000 executions per state machine. To handle spikes, the team should request a limit increase. Option A is wrong because Express Workflows are designed for high-volume event-driven workloads and have different limits (e.g., 5-minute max duration), which may not meet the SLA. Option B is wrong because increasing the timeout does not affect execution limits. Option C is wrong because Lambda concurrency limits are separate from Step Functions execution limits.
What should I do if I get this DEA-C01 question wrong?
Identify which DEA-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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Question Discussion
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