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 CodeBuild to build a Docker image and push it to Amazon ECR. The buildspec.yml includes a 'post_build' phase command to tag the image. The build fails with 'unauthorized: authentication required'. What must be done to resolve this?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Add 'ecr:InitiateLayerUpload' and 'ecr:CompleteLayerUpload' permissions to the CodeBuild service role.
CodeBuild needs permission to push to ECR. The IAM role must have appropriate ECR permissions. Option A is correct.
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.
✓
Add 'ecr:InitiateLayerUpload' and 'ecr:CompleteLayerUpload' permissions to the CodeBuild service role.
Why this is correct
These are required for pushing Docker images to ECR.
Related concept
Read the scenario before looking for a memorised answer.
✗
Use the 'docker login' command with AWS CLI in the build phase.
Why it's wrong here
The login command requires proper permissions; without role permissions, it will fail.
✗
Install the AWS CLI in the CodeBuild build environment.
Why it's wrong here
AWS CLI is already installed; the issue is permissions.
✗
Create a new IAM user with ECR permissions and store the keys in CodeBuild environment variables.
Why it's wrong here
Using long-term credentials is not best practice; service role is preferred.
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.
Trap categories for this question
Command / output trap
The login command requires proper permissions; without role permissions, it will fail.
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
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.
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: Add 'ecr:InitiateLayerUpload' and 'ecr:CompleteLayerUpload' permissions to the CodeBuild service role. — CodeBuild needs permission to push to ECR. The IAM role must have appropriate ECR permissions. Option A is correct.
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.
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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
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