- A
Use Amazon CloudFront to proxy requests to the S3 bucket.
Why wrong: CloudFront does not grant write access to the application.
- B
Hardcode the AWS access keys in the application code.
Why wrong: Hardcoding credentials is insecure.
- C
Apply an S3 bucket policy that allows access from the Elastic Beanstalk environment's security group.
Why wrong: Bucket policies are based on IAM principals, not security groups.
- D
Configure the Elastic Beanstalk environment to use an IAM instance profile that grants S3 access.
The instance profile provides permissions to the EC2 instances running the application.
Question 1,528 of 1,616
Configuring IAM Instance Profile for S3 Access in Elastic Beanstalk
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 company uses AWS Elastic Beanstalk to deploy a web application. The application stores user-uploaded images in an S3 bucket. The developer needs to ensure that the application can read and write to the S3 bucket. What should the developer do?
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
✓
Configure the Elastic Beanstalk environment to use an IAM instance profile that grants S3 access.
Option D is correct because Elastic Beanstalk environments run on EC2 instances, and the recommended way to grant AWS permissions to those instances is by attaching an IAM instance profile. This profile includes an IAM role with a policy that allows the required S3 read and write actions, enabling the application to securely access the S3 bucket without embedding credentials in the code.
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.
- ✗
Use Amazon CloudFront to proxy requests to the S3 bucket.
Why it's wrong here
CloudFront does not grant write access to the application.
- ✗
Hardcode the AWS access keys in the application code.
Why it's wrong here
Hardcoding credentials is insecure.
- ✗
Apply an S3 bucket policy that allows access from the Elastic Beanstalk environment's security group.
Why it's wrong here
Bucket policies are based on IAM principals, not security groups.
- ✓
Configure the Elastic Beanstalk environment to use an IAM instance profile that grants S3 access.
Why this is correct
The instance profile provides permissions to the EC2 instances running the application.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates may confuse network-level controls (security groups) with identity-based controls (IAM roles) and incorrectly assume that an S3 bucket policy can reference a security group, when in fact S3 bucket policies support only principal, source IP, VPC, or source VPC endpoint conditions, not security group IDs.
Detailed technical explanation
How to think about this question
Under the hood, the IAM instance profile is associated with the EC2 instances at launch, and the AWS SDK automatically retrieves temporary credentials from the instance metadata service (IMDS) to sign API requests. This approach avoids long-term credential storage and supports automatic rotation of credentials. In a real-world scenario, if the application needs cross-account S3 access, you would combine the instance profile with a bucket policy that grants access to the role's ARN.
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 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.
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.
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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: Configure the Elastic Beanstalk environment to use an IAM instance profile that grants S3 access. — Option D is correct because Elastic Beanstalk environments run on EC2 instances, and the recommended way to grant AWS permissions to those instances is by attaching an IAM instance profile. This profile includes an IAM role with a policy that allows the required S3 read and write actions, enabling the application to securely access the S3 bucket without embedding credentials in the code.
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.
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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