- A
Launch the environment in a VPC with a NAT Gateway in a public subnet.
NAT Gateway provides a fixed public IP for outbound traffic.
- B
Attach an Internet Gateway to the VPC.
Why wrong: Internet Gateway allows inbound and outbound but does not provide a fixed IP.
- C
Use a VPC endpoint for the third-party API.
Why wrong: VPC endpoints are for AWS services, not third-party.
- D
Assign an Elastic IP to each EC2 instance.
Why wrong: Not managed by Elastic Beanstalk, and not cost-effective.
Question 714 of 1,616
Most Cost-Effective Fixed IP for Outbound Traffic 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 developer is deploying a web application on AWS Elastic Beanstalk. The application requires a fixed IP address for outbound traffic to a third-party API. What is the MOST cost-effective solution?
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
✓
Launch the environment in a VPC with a NAT Gateway in a public subnet.
Option A is correct because a NAT Gateway in a public subnet provides a fixed public IP address for outbound traffic from private subnets, enabling the web application to communicate with the third-party API while remaining secure. Elastic Beanstalk environments are typically launched in private subnets, and the NAT Gateway is the most cost-effective managed service for this purpose compared to a NAT instance or assigning Elastic IPs to each EC2 instance.
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.
- ✓
Launch the environment in a VPC with a NAT Gateway in a public subnet.
- ✗
Attach an Internet Gateway to the VPC.
Why it's wrong here
Internet Gateway allows inbound and outbound but does not provide a fixed IP.
- ✗
Use a VPC endpoint for the third-party API.
Why it's wrong here
VPC endpoints are for AWS services, not third-party.
- ✗
Assign an Elastic IP to each EC2 instance.
Why it's wrong here
Not managed by Elastic Beanstalk, and not cost-effective.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse a NAT Gateway with an Internet Gateway, thinking the latter provides outbound IPs, or they incorrectly assume a VPC endpoint can be used for any external API, when it is limited to AWS services.
Detailed technical explanation
How to think about this question
A NAT Gateway uses an Elastic IP (EIP) assigned at creation, which remains fixed for outbound traffic. Under the hood, it performs source network address translation (SNAT) for traffic from private subnets, replacing the private source IP with the NAT Gateway's EIP. In a real-world scenario, if the third-party API requires IP whitelisting, the NAT Gateway's EIP is the single point of configuration, avoiding the need to update whitelists when instances scale or are replaced.
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 startup's cloud architect reviews their monthly bill and notices costs are higher than expected for a long-running batch job. Switching from on-demand instances to Reserved Instances — or using Spot/Preemptible VMs — can reduce compute costs by up to 72 %. Questions like this test whether you understand the tradeoffs between commitment, flexibility, and cost across cloud pricing models.
Visual reference
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.
- →
Development with AWS Services — study guide chapter
Learn the concepts, then practise the questions
- →
Development with AWS Services 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?
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: Launch the environment in a VPC with a NAT Gateway in a public subnet. — Option A is correct because a NAT Gateway in a public subnet provides a fixed public IP address for outbound traffic from private subnets, enabling the web application to communicate with the third-party API while remaining secure. Elastic Beanstalk environments are typically launched in private subnets, and the NAT Gateway is the most cost-effective managed service for this purpose compared to a NAT instance or assigning Elastic IPs to each EC2 instance.
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.
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: 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.
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.