The answer is to configure the CodeBuild project to use a VPC with a NAT gateway to the internet. This resolves npm package download timeouts because CodeBuild build environments running in an AWS-managed network can experience inconsistent outbound internet access, especially when scaling or during peak usage. By placing the build environment inside a private subnet with a NAT gateway, you guarantee a stable, dedicated route to the internet for downloading packages from the npm registry, eliminating the transient network failures that cause timeouts. On the AWS Certified DevOps Engineer Professional DOP-C02 exam, this question tests your understanding of how to architect reliable build infrastructure, specifically that CodeBuild’s default public endpoints are shared and can throttle, while a VPC with NAT provides predictable egress. A common trap is assuming that increasing the npm timeout or using a custom Docker image fixes the root cause—neither addresses the underlying network path. Memory tip: think “NAT for net” – if npm times out, route through a NAT gateway for a stable internet connection.
DOP-C02 SDLC Automation Practice Question
This DOP-C02 practice question tests your understanding of sdlc automation. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. 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 CodePipeline to deploy a Node.js application to AWS Elastic Beanstalk. The pipeline includes a build stage that runs 'npm install' and 'npm test'. The team notices that the build stage often fails due to network timeouts when downloading npm packages. Which action would MOST reliably resolve this issue?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Configure the CodeBuild project to use a VPC with a NAT gateway to the internet.
Option B is correct because using a VPC with a NATgateway ensures consistent outbound internet access for CodeBuild. Option A is wrong because npm packages are not cached by default. Option C is wrong because increasing timeout may not resolve timeouts. Option D is wrong because using a custom image does not fix network issues.
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.
✓
Configure the CodeBuild project to use a VPC with a NAT gateway to the internet.
Why this is correct
Provides reliable internet access from CodeBuild.
Related concept
Static NAT maps one inside address to one outside address.
✗
Use a custom Docker image that includes pre-installed npm packages.
Why it's wrong here
Custom image still needs to download packages if not included.
✗
Enable local dependency caching in the buildspec file.
Why it's wrong here
Caching helps after first download, but initial download still fails.
✗
Increase the build timeout to the maximum value.
Why it's wrong here
Does not address network timeouts.
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 company's IT admin needs to give a contractor read-only access to production logs without sharing account credentials. Using role-based access control (RBAC) and temporary scoped permissions — not a permanent shared password — is the correct pattern. Questions like this test whether you can apply least-privilege access across cloud identity services.
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 DOP-C02 NAT questions on configuration and troubleshooting.
SDLC Automation — This question tests SDLC Automation — Static NAT maps one inside address to one outside address..
What is the correct answer to this question?
The correct answer is: Configure the CodeBuild project to use a VPC with a NAT gateway to the internet. — Option B is correct because using a VPC with a NAT gateway ensures consistent outbound internet access for CodeBuild. Option A is wrong because npm packages are not cached by default. Option C is wrong because increasing timeout may not resolve timeouts. Option D is wrong because using a custom image does not fix network issues.
What should I do if I get this DOP-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 DOP-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.
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 →
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.
This DOP-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 DOP-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.