The answer is that another deployment is currently in progress for the same Lambda function. This ResourceConflictException error occurs because AWS Lambda enforces a single-threaded update model for function code and configuration; if you attempt to deploy a new version while a previous update is still being applied, the service rejects the request to prevent state corruption. On the AWS Certified Developer Associate DVA-C02 exam, this question tests your understanding of Lambda’s deployment concurrency limits, often appearing as a trap where candidates mistakenly blame IAM permissions or code size limits. A common memory tip is to think of Lambda as a single-lane road: you cannot start a second car (deployment) until the first one has finished driving through. Remember the phrase “one update at a time” to avoid this pitfall.
DVA-C02 Troubleshooting and Optimization Practice Question
This DVA-C02 practice question tests your understanding of troubleshooting and optimization. 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 developer is deploying a new version of an AWS Lambda function using the AWS CLI. The deployment fails with a 'ResourceConflictException' error. What is the MOST likely cause?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "most likely"
Why it matters: Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Another deployment is currently in progress for the same Lambda function.
Option A is correct because the error indicates that the function code or configuration is being updated while a previous update is still in progress. Option B is wrong because the error is not related to IAM permissions. Option C is wrong because publishing a new version does not conflict with an alias. Option D is wrong because the error is not about exceeding the function code size limit.
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.
✓
Another deployment is currently in progress for the same Lambda function.
Why this is correct
Lambda does not allow concurrent updates to the same function.
Clue confirmation
The clue word "most likely" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
The Lambda function code exceeds the maximum allowed size.
Why it's wrong here
Exceeding size limits would cause an InvalidParameterValueException.
✗
The Lambda function has an alias that conflicts with the version number.
Why it's wrong here
Aliases are separate from version numbers and do not cause conflicts.
✗
The IAM role associated with the Lambda function does not have sufficient permissions.
Why it's wrong here
Permissions issues would cause AccessDeniedException, not ResourceConflictException.
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 DVA-C02 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.
Troubleshooting and Optimization — This question tests Troubleshooting and Optimization — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Another deployment is currently in progress for the same Lambda function. — Option A is correct because the error indicates that the function code or configuration is being updated while a previous update is still in progress. Option B is wrong because the error is not related to IAM permissions. Option C is wrong because publishing a new version does not conflict with an alias. Option D is wrong because the error is not about exceeding the function code size limit.
What should I do if I get this DVA-C02 question wrong?
Identify which DVA-C02 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.
Are there clue words in this question I should notice?
Yes — watch for: "most likely". Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
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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