- A
Set the S3 bucket's object-level permissions to allow the Lambda function.
Why wrong: Incorrect: Object-level permissions are not used for cross-account access.
- B
Use AWS Key Management Service (KMS) to grant the Lambda function access to the S3 bucket.
Why wrong: Incorrect: KMS is for encryption, not access control.
- C
Add a bucket policy on the S3 bucket that grants access to the Lambda function's execution role.
Correct: The bucket policy must allow the Lambda role.
- D
Attach an IAM policy to the Lambda execution role with permissions for s3:GetObject.
Correct: The execution role needs S3 read permission.
- E
Create an IAM user with S3 read permissions and configure the Lambda function to assume that user.
Why wrong: Incorrect: Lambda uses execution roles, not IAM users.
DVA-C02 Development with AWS Services Practice Question
This DVA-C02 practice question tests your understanding of development with aws services. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. 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 building a serverless application using AWS Lambda and Amazon API Gateway. The application processes user uploads stored in an S3 bucket. The developer needs to ensure that the Lambda function can read objects from the S3 bucket. Which TWO steps should the developer take to meet this requirement? (Choose two.)
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
Add a bucket policy on the S3 bucket that grants access to the Lambda function's execution role.
Option A is correct because the Lambda execution role must have an IAM policy granting s3:GetObject permission. Option C is correct because the S3 bucket policy must explicitly allow the Lambda function's execution role to access the objects. Option B is incorrect because Lambda functions use an execution role, not an IAM user. Option D is incorrect because S3 bucket policies are evaluated at the bucket level, not the object level. Option E is incorrect because KMS is not required for S3 access unless encryption is involved.
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.
- ✗
Set the S3 bucket's object-level permissions to allow the Lambda function.
Why it's wrong here
Incorrect: Object-level permissions are not used for cross-account access.
- ✗
Use AWS Key Management Service (KMS) to grant the Lambda function access to the S3 bucket.
Why it's wrong here
Incorrect: KMS is for encryption, not access control.
- ✓
Add a bucket policy on the S3 bucket that grants access to the Lambda function's execution role.
Why this is correct
Correct: The bucket policy must allow the Lambda role.
Related concept
Read the scenario before looking for a memorised answer.
- ✓
Attach an IAM policy to the Lambda execution role with permissions for s3:GetObject.
Why this is correct
Correct: The execution role needs S3 read permission.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Create an IAM user with S3 read permissions and configure the Lambda function to assume that user.
Why it's wrong here
Incorrect: Lambda uses execution roles, not IAM users.
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 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.
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.
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Development with AWS Services — study guide chapter
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FAQ
Questions learners often ask
What does this DVA-C02 question test?
Development with AWS Services — This question tests Development with AWS Services — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Add a bucket policy on the S3 bucket that grants access to the Lambda function's execution role. — Option A is correct because the Lambda execution role must have an IAM policy granting s3:GetObject permission. Option C is correct because the S3 bucket policy must explicitly allow the Lambda function's execution role to access the objects. Option B is incorrect because Lambda functions use an execution role, not an IAM user. Option D is incorrect because S3 bucket policies are evaluated at the bucket level, not the object level. Option E is incorrect because KMS is not required for S3 access unless encryption is involved.
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.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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 →
Last reviewed: Jun 20, 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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