- A
Ensure the S3 bucket has versioning enabled.
Why wrong: Versioning is not related to ResourceNotFoundException.
- B
Check the S3 bucket notification configuration for the correct Lambda function ARN.
Incorrect ARN can cause the function not to be invoked.
- C
Verify that the Lambda execution role has permissions to read from the S3 bucket.
The role needs s3:GetObject to access the object.
- D
Increase the Lambda function timeout.
Why wrong: Timeout does not cause ResourceNotFoundException.
- E
Confirm that the S3 bucket exists and is in the same region as the Lambda function.
Cross-region notifications are not supported for S3 to Lambda.
Question 198 of 1,616
DVA-C02 S3 Bucket Notification Configuration 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. A key principle to apply: s3 Bucket Notification Configuration. 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 Lambda functions that are invoked by an Amazon S3 bucket notification. The function sometimes fails with a 'ResourceNotFoundException' for the S3 bucket. Which THREE steps should the developer take to resolve the issue?
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
✓
Check the S3 bucket notification configuration for the correct Lambda function ARN.
The 'ResourceNotFoundException' for the S3 bucket indicates that the Lambda function cannot locate or access the S3 bucket when invoked via notification. This can occur due to three reasons: (B) The S3 notification configuration has an incorrect Lambda function ARN, so S3 cannot find the function to invoke it, resulting in a ResourceNotFoundException. (C) The Lambda execution role lacks permissions to read from the S3 bucket; although a permission issue typically causes AccessDeniedException, in some SDKs or scenarios it may manifest as ResourceNotFoundException when attempting to access the bucket. (E) The S3 bucket no longer exists or is in a different region; Lambda functions must be in the same region as the S3 bucket to access it without cross-region configurations. Options A (enabling versioning) and D (increasing timeout) do not address the bucket not found error.
Key principle: S3 Bucket Notification Configuration
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Ensure the S3 bucket has versioning enabled.
Why it's wrong here
Versioning is not related to ResourceNotFoundException.
- ✓
Check the S3 bucket notification configuration for the correct Lambda function ARN.
Why this is correct
Incorrect ARN can cause the function not to be invoked.
Related concept
S3 Bucket Notification Configuration
- ✓
Verify that the Lambda execution role has permissions to read from the S3 bucket.
Why this is correct
The role needs s3:GetObject to access the object.
Related concept
S3 Bucket Notification Configuration
- ✗
Increase the Lambda function timeout.
Why it's wrong here
Timeout does not cause ResourceNotFoundException.
- ✓
Confirm that the S3 bucket exists and is in the same region as the Lambda function.
Why this is correct
Cross-region notifications are not supported for S3 to Lambda.
Related concept
S3 Bucket Notification Configuration
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often assume 'ResourceNotFoundException' strictly means the S3 bucket does not exist, overlooking that it can also occur due to an incorrect notification configuration (Option B) or insufficient permissions (Option C) in certain SDK implementations. The correct answer set includes Option C because, in some cases, a permissions error may surface as a ResourceNotFoundException when the Lambda function attempts to access the bucket.
Detailed technical explanation
How to think about this question
Under the hood, S3 bucket notifications use a resource-based policy on the Lambda function to allow S3 to invoke it, and the notification configuration stores the function ARN. If the ARN is incorrect (e.g., due to a typo, cross-account mismatch, or function deletion), S3's invocation request fails with a 'ResourceNotFoundException' before the function even executes. In real-world scenarios, this often occurs after a function is redeployed with a new ARN (e.g., after a version update) without updating the S3 notification configuration.
KKey Concepts to Remember
- S3 Bucket Notification Configuration
- Lambda Execution Role
- Cross-Region Limitations
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
S3 Bucket Notification Configuration
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.
Visual reference
Quick reference
AWS S3 Storage Class Comparison
| Storage Class | Min Duration | Retrieval | Use Case |
|---|---|---|---|
| S3 Standard | None | Immediate | Frequently accessed data |
| S3 Standard-IA | 30 days | Immediate | Infrequent access, rapid retrieval |
| S3 One Zone-IA | 30 days | Immediate | Non-critical infrequent data |
| S3 Intelligent-Tiering | None | Immediate–hours | Unknown or changing access patterns |
| S3 Glacier Instant | 90 days | Milliseconds | Archive with instant retrieval |
| S3 Glacier Flexible | 90 days | Minutes–hours | Archive, flexible retrieval |
| S3 Glacier Deep Archive | 180 days | Hours | Long-term compliance archive |
What to study next
Got this wrong? Here's your next step.
Review s3 Bucket Notification Configuration, then practise related DVA-C02 questions on the same topic to reinforce the concept.
- →
Troubleshooting and Optimization — study guide chapter
Learn the concepts, then practise the questions
- →
Troubleshooting and Optimization practice questions
Targeted practice on this topic area only
- →
All DVA-C02 questions
1,616 questions across all exam domains
- →
AWS Certified Developer Associate DVA-C02 study guide
Full concept coverage aligned to exam objectives
- →
DVA-C02 practice test guide
How to use practice tests most effectively before exam day
Related practice questions
Related DVA-C02 practice-question pages
Use these pages to review the topic behind this question. This is how one missed question becomes focused revision.
Development with AWS Services practice questions
Practise DVA-C02 questions linked to Development with AWS Services.
Security practice questions
Practise DVA-C02 questions linked to Security.
Deployment practice questions
Practise DVA-C02 questions linked to Deployment.
Troubleshooting and Optimization practice questions
Practise DVA-C02 questions linked to Troubleshooting and Optimization.
DVA-C02 fundamentals practice questions
Practise DVA-C02 questions linked to DVA-C02 fundamentals.
DVA-C02 scenario practice questions
Practise DVA-C02 questions linked to DVA-C02 scenario.
DVA-C02 troubleshooting practice questions
Practise DVA-C02 questions linked to DVA-C02 troubleshooting.
Practice this exam
Start a free DVA-C02 practice session
Short sessions build daily habit. Longer sessions build exam-day stamina. Try a timed session to simulate real conditions.
FAQ
Questions learners often ask
What does this DVA-C02 question test?
Troubleshooting and Optimization — This question tests Troubleshooting and Optimization — S3 Bucket Notification Configuration.
What is the correct answer to this question?
The correct answer is: Check the S3 bucket notification configuration for the correct Lambda function ARN. — The 'ResourceNotFoundException' for the S3 bucket indicates that the Lambda function cannot locate or access the S3 bucket when invoked via notification. This can occur due to three reasons: (B) The S3 notification configuration has an incorrect Lambda function ARN, so S3 cannot find the function to invoke it, resulting in a ResourceNotFoundException. (C) The Lambda execution role lacks permissions to read from the S3 bucket; although a permission issue typically causes AccessDeniedException, in some SDKs or scenarios it may manifest as ResourceNotFoundException when attempting to access the bucket. (E) The S3 bucket no longer exists or is in a different region; Lambda functions must be in the same region as the S3 bucket to access it without cross-region configurations. Options A (enabling versioning) and D (increasing timeout) do not address the bucket not found error.
What should I do if I get this DVA-C02 question wrong?
Review s3 Bucket Notification Configuration, then practise related DVA-C02 questions on the same topic to reinforce the concept.
What is the key concept behind this question?
S3 Bucket Notification Configuration
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
Keep practising
More DVA-C02 practice questions
- A developer is troubleshooting an AWS Lambda function that is triggered by an S3 event. The function occasionally fails…
- A developer needs to call AWS APIs from application code running on EC2. Which credential source should the AWS SDK use…
- A developer needs to allow an IAM user in a different AWS account to assume a role in the developer's account. The role…
- A developer needs to grant an IAM role in Account B read-only access to objects in an S3 bucket in Account A. The bucket…
- An API Gateway HTTP API should allow access only to users authenticated by an external OIDC provider. Which authorizer t…
- A developer needs to allow an EC2 instance to read from a DynamoDB table. Which is the best practice to grant permission…
Last reviewed: Jun 24, 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.
Question Discussion
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
Sign in to join the discussion.