- A
The ECR repository is in a different AWS account and the IAM role does not have cross-account trust.
Why wrong: Cross-account would require repository policy; but error suggests repository doesn't exist in the current account context.
- B
The CodeBuild project's environment image override is set to the wrong image name.
Why wrong: This is similar to B but more general; the error is specifically about repository existence, not just name mismatch.
- C
The image tag specified in the buildspec does not exist in the ECR repository.
If the tag is missing, CodeBuild cannot pull the image, resulting in 'repository does not exist' error.
- D
The CodeBuild project is configured with a VPC that does not have a NAT gateway.
Why wrong: This would cause a network timeout, not a repository not found error.
DVA-C02 Deployment Practice Question
This DVA-C02 practice question tests your understanding of deployment. 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 DevOps engineer is troubleshooting a failed AWS CodeBuild build. The build project uses a custom Docker image stored in Amazon ECR. The build logs show: 'Error: Cannot pull Docker image: repository does not exist or may require 'docker login'.' The engineer has verified that the ECR repository exists and the IAM role used by CodeBuild has the 'ecr:GetDownloadUrlForLayer', 'ecr:BatchGetImage', and 'ecr:GetAuthorizationToken' permissions. What is the MOST likely cause?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue:
"most likely"Why it matters: Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
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
The image tag specified in the buildspec does not exist in the ECR repository.
Option B is correct: The image tag or digest in the buildspec might be incorrect or not exist in the repository. Option A (VPC) would cause network timeout, not repository does not exist error. Option C (cross-account) would need different permissions. Option D (image name) is plausible but the error explicitly says 'repository does not exist', indicating issue with repository name or tag.
Key principle: Authentication proves identity; authorization controls what that identity can do after login. Both must work for full privileged access.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
The ECR repository is in a different AWS account and the IAM role does not have cross-account trust.
Why it's wrong here
Cross-account would require repository policy; but error suggests repository doesn't exist in the current account context.
- ✗
The CodeBuild project's environment image override is set to the wrong image name.
Why it's wrong here
This is similar to B but more general; the error is specifically about repository existence, not just name mismatch.
- ✓
The image tag specified in the buildspec does not exist in the ECR repository.
Why this is correct
If the tag is missing, CodeBuild cannot pull the image, resulting in 'repository does not exist' error.
Clue confirmation
The clue word "most likely" in the question point toward this answer.
Related concept
Authentication checks who the user is.
- ✗
The CodeBuild project is configured with a VPC that does not have a NAT gateway.
Why it's wrong here
This would cause a network timeout, not a repository not found error.
Common exam traps
Common exam trap: authentication is not authorization
Logging in proves the user can authenticate. It does not automatically mean the user is allowed to enter privileged or configuration mode. Watch for AAA authorization, privilege level and command authorization details.
Trap categories for this question
Similar concept trap
This is similar to B but more general; the error is specifically about repository existence, not just name mismatch.
Detailed technical explanation
How to think about this question
This kind of question is testing the difference between identity and permission. A user may successfully log in to a router because authentication is working, but still fail to enter configuration mode because authorization is missing, misconfigured or mapped to a lower privilege level.
KKey Concepts to Remember
- Authentication checks who the user is.
- Authorization controls what the user is allowed to do after login.
- Privilege levels affect access to EXEC and configuration commands.
- AAA, TACACS+ and RADIUS can separate login success from command access.
TExam Day Tips
- Do not assume successful login means full administrative access.
- Look for words such as cannot enter configuration mode, privilege level, authorization or command access.
- Separate login problems from permission problems before choosing the answer.
Key takeaway
Authentication proves identity; authorization controls what that identity can do after login. Both must work for full privileged access.
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 Cisco AAA concepts — authentication, authorization, and accounting. Study privilege levels (0–15), command authorization under TACACS+, and how RADIUS differs. Then practise related DVA-C02 questions on access control and AAA configuration.
- →
Deployment — study guide chapter
Learn the concepts, then practise the questions
- →
Deployment 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?
Deployment — This question tests Deployment — Authentication checks who the user is..
What is the correct answer to this question?
The correct answer is: The image tag specified in the buildspec does not exist in the ECR repository. — Option B is correct: The image tag or digest in the buildspec might be incorrect or not exist in the repository. Option A (VPC) would cause network timeout, not repository does not exist error. Option C (cross-account) would need different permissions. Option D (image name) is plausible but the error explicitly says 'repository does not exist', indicating issue with repository name or tag.
What should I do if I get this DVA-C02 question wrong?
Review Cisco AAA concepts — authentication, authorization, and accounting. Study privilege levels (0–15), command authorization under TACACS+, and how RADIUS differs. Then practise related DVA-C02 questions on access control and AAA configuration.
Are there clue words in this question I should notice?
Yes — watch for: "most likely". Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
What is the key concept behind this question?
Authentication checks who the user is.
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 →
Last reviewed: Jun 20, 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.