The answer is to add an install phase that runs npm install and to ensure aws-sdk is listed in the package.json file. This resolves the missing module error because AWS CodeBuild executes build phases sequentially, and the install phase is specifically designed to fetch and install dependencies defined in package.json before any build commands run. Without explicitly running npm install, CodeBuild will not download the required node_modules, even if the runtime is correctly configured. On the AWS Certified DevOps Engineer Professional DOP-C02 exam, this question tests your understanding of the CodeBuild buildspec lifecycle phases—install, pre_build, build, and post_build—and a common trap is assuming the runtime automatically includes all SDK modules. Remember the memory tip: "Install before you build, or your modules won't be fulfilled."
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 team uses AWS CodeBuild to build a Node.js application. The buildspec.yml file is at the root of the repository. The build fails with 'Error: Cannot find module 'aws-sdk''. Which TWO actions could resolve the issue? (Choose TWO.)
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Ensure 'aws-sdk' is listed in the 'dependencies' section of package.json.
B and E are correct. B: Including 'npm install' installs dependencies from package.json. E: Adding aws-sdk to package.json ensures it is installed. A is incorrect because pre_build runs after install. C is incorrect because runtime version does not affect module availability. D is incorrect because build commands are for building, not installing dependencies.
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.
✓
Ensure 'aws-sdk' is listed in the 'dependencies' section of package.json.
Why this is correct
Without it, npm install will not install aws-sdk.
Related concept
Read the scenario before looking for a memorised answer.
✗
Specify a different Node.js runtime version in the buildspec.
Why it's wrong here
Runtime version does not affect module availability.
Read the scenario before looking for a memorised answer.
✗
Add a 'build' phase command to compile the code.
Why it's wrong here
Compilation is not for installing modules.
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
An e-commerce site experiences heavy traffic on Black Friday and near-zero traffic during off-peak weeks. Rather than provisioning permanent large VMs, the team uses auto-scaling groups that add capacity automatically under load and reduce it overnight. Questions like this test whether you understand elasticity, availability zones, and cloud compute scaling patterns.
What to study next
Got this wrong? Here's your next step.
Identify which DOP-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.
SDLC Automation — This question tests SDLC Automation — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Ensure 'aws-sdk' is listed in the 'dependencies' section of package.json. — B and E are correct. B: Including 'npm install' installs dependencies from package.json. E: Adding aws-sdk to package.json ensures it is installed. A is incorrect because pre_build runs after install. C is incorrect because runtime version does not affect module availability. D is incorrect because build commands are for building, not installing dependencies.
What should I do if I get this DOP-C02 question wrong?
Identify which DOP-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 →
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.