- A
Another deployment is currently in progress for the same Lambda function.
Lambda does not allow concurrent updates to the same function.
- B
The Lambda function code exceeds the maximum allowed size.
Why wrong: Exceeding size limits would cause an InvalidParameterValueException.
- C
The Lambda function has an alias that conflicts with the version number.
Why wrong: Aliases are separate from version numbers and do not cause conflicts.
- D
The IAM role associated with the Lambda function does not have sufficient permissions.
Why wrong: Permissions issues would cause AccessDeniedException, not ResourceConflictException.
Question 503 of 1,616
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 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
✓
Another deployment is currently in progress for the same Lambda function.
The 'ResourceConflictException' error in AWS Lambda occurs when you attempt to update a Lambda function while another update operation is already in progress. Lambda enforces a single in-flight update per function to prevent race conditions and ensure state consistency. The AWS CLI command (e.g., update-function-code) will fail immediately if a previous deployment has not completed, even if the previous deployment was triggered by the same or a different client.
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
The trap here is that candidates confuse 'ResourceConflictException' with permission errors or code size limits, but AWS specifically uses this exception to signal a concurrent update conflict, not a validation or authorization issue.
Detailed technical explanation
How to think about this question
Under the hood, Lambda uses a state machine for each function version; when you initiate an update (e.g., code or configuration), the function enters a 'Pending' state until the operation completes. Any concurrent update attempt is rejected with HTTP 409 (ResourceConflictException). This is similar to the optimistic locking mechanism used in DynamoDB or S3, but here it's enforced at the function level. In practice, this error often occurs in CI/CD pipelines that trigger multiple deployments in rapid succession without waiting for the previous one to finish.
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.
TExam Day Tips
- 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.
Quick reference
Cloud Service Model Comparison
| Model | You Manage | Provider Manages | Examples |
|---|---|---|---|
| IaaS | OS, runtime, apps, data | Hardware, hypervisor, networking | EC2, Azure VMs, GCP Compute Engine |
| PaaS | Apps and data | OS, runtime, middleware, hardware | Elastic Beanstalk, Azure App Service |
| SaaS | Data and settings only | Everything else | Microsoft 365, Salesforce, Workday |
| FaaS / Serverless | Function code only | Infra, scaling, runtime | Lambda, Azure Functions, Cloud Run |
| CaaS | Containers and apps | Kubernetes, OS, hardware | EKS, AKS, GKE |
What to study next
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
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Troubleshooting and Optimization — study guide chapter
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FAQ
Questions learners often ask
What does this DVA-C02 question test?
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. — The 'ResourceConflictException' error in AWS Lambda occurs when you attempt to update a Lambda function while another update operation is already in progress. Lambda enforces a single in-flight update per function to prevent race conditions and ensure state consistency. The AWS CLI command (e.g., update-function-code) will fail immediately if a previous deployment has not completed, even if the previous deployment was triggered by the same or a different client.
What should I do if I get this DVA-C02 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
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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Last reviewed: Jul 4, 2026
This DVA-C02 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 DVA-C02 exam.
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