- A
Create an IAM execution role for the Lambda function with permissions to read from the source bucket and write to the destination bucket.
Lambda functions require an execution role to access AWS resources.
- B
Configure a bucket policy on the destination S3 bucket that grants the Lambda execution role s3:PutObject permission.
Bucket policies can grant cross-account or cross-service access.
- C
Store the AWS access key and secret key in the Lambda environment variables.
Why wrong: Storing credentials in code is insecure; use execution roles instead.
- D
Assign an IAM user to the Lambda function and embed the user's access key in the function code.
Why wrong: Lambda does not use IAM users; it uses execution roles.
- E
Attach an IAM instance profile to the Lambda function.
Why wrong: Instance profiles are for EC2 instances, not Lambda.
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 to process images uploaded to an S3 bucket. The Lambda function needs to resize each image and store the result in another S3 bucket. Which TWO actions should the developer take to ensure the function can access the S3 buckets securely?
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
Create an IAM execution role for the Lambda function with permissions to read from the source bucket and write to the destination bucket.
Option A is correct because Lambda functions need an execution role with permissions. Option D is correct because S3 bucket policies can grant access to the Lambda function's execution role. Option B is incorrect because Lambda functions do not use IAM users. Option C is incorrect because EC2 instance profiles are for EC2, not Lambda. Option E is incorrect because Lambda does not use access keys directly.
Key principle: NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Create an IAM execution role for the Lambda function with permissions to read from the source bucket and write to the destination bucket.
Why this is correct
Lambda functions require an execution role to access AWS resources.
Related concept
Static NAT maps one inside address to one outside address.
- ✓
Configure a bucket policy on the destination S3 bucket that grants the Lambda execution role s3:PutObject permission.
Why this is correct
Bucket policies can grant cross-account or cross-service access.
Related concept
Static NAT maps one inside address to one outside address.
- ✗
Store the AWS access key and secret key in the Lambda environment variables.
Why it's wrong here
Storing credentials in code is insecure; use execution roles instead.
- ✗
Assign an IAM user to the Lambda function and embed the user's access key in the function code.
Why it's wrong here
Lambda does not use IAM users; it uses execution roles.
- ✗
Attach an IAM instance profile to the Lambda function.
Why it's wrong here
Instance profiles are for EC2 instances, not Lambda.
Common exam traps
Common exam trap: NAT rules depend on direction and matching traffic
NAT is not only about the public address. The inside/outside interface roles and the ACL or rule that matches traffic are just as important.
Detailed technical explanation
How to think about this question
NAT questions usually test address translation, overload/PAT behaviour, static mappings and whether the right traffic is being translated. Read the interface direction and address terms carefully.
KKey Concepts to Remember
- Static NAT maps one inside address to one outside address.
- PAT allows many inside hosts to share one public address using ports.
- Inside local and inside global describe the private and translated addresses.
- NAT ACLs identify traffic for translation, not always security filtering.
TExam Day Tips
- Identify inside and outside interfaces first.
- Check whether the scenario needs static NAT, dynamic NAT or PAT.
- Do not confuse NAT matching ACLs with normal packet-filtering intent.
Key takeaway
NAT direction and interface roles matter as much as the IP address mapping. Inside/outside designation controls which traffic is translated.
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.
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related DVA-C02 NAT questions on configuration and troubleshooting.
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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 — Static NAT maps one inside address to one outside address..
What is the correct answer to this question?
The correct answer is: Create an IAM execution role for the Lambda function with permissions to read from the source bucket and write to the destination bucket. — Option A is correct because Lambda functions need an execution role with permissions. Option D is correct because S3 bucket policies can grant access to the Lambda function's execution role. Option B is incorrect because Lambda functions do not use IAM users. Option C is incorrect because EC2 instance profiles are for EC2, not Lambda. Option E is incorrect because Lambda does not use access keys directly.
What should I do if I get this DVA-C02 question wrong?
Review the four NAT address types (inside local, inside global, outside local, outside global), PAT port overload, and static vs dynamic NAT use cases. Then practise related DVA-C02 NAT questions on configuration and troubleshooting.
What is the key concept behind this question?
Static NAT maps one inside address to one outside address.
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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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