The answer is to add a command in the buildspec.yml to clean the cache directory before the build phase. This resolves the "CodeBuild no space left on device cache" issue because CodeBuild’s managed build environments, like the general1.large type with only 8 GB of disk space, can fill up quickly when cached dependencies, artifacts, or previous build outputs accumulate across runs. By explicitly clearing the cache—often located in /root/.cache or /tmp—before the build starts, you reclaim critical disk space without modifying application code. On the AWS Certified Developer Associate DVA-C02 exam, this scenario tests your understanding of CodeBuild’s ephemeral storage limits and the fact that you cannot mount EBS volumes or change instance types in a managed environment. A common trap is assuming you can increase storage via EFS or instance changes, but the correct fix is always cleanup. Memory tip: “Cache before cache-out” — always clean the cache before the build to avoid running out of space.
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 developer is using AWS CodeBuild to build a Java application. The buildspec.yml file includes commands to run unit tests and package the application. Recently, the build started failing with the error 'No space left on device.' The developer notices that the build environment is using the general1.large compute type with 8 GB of disk space. The developer needs to resolve the disk space issue without modifying the application code. The build environment is managed by CodeBuild and the developer cannot change the instance type. What should the developer do?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Add a command in the buildspec.yml to clean the cache directory before the build phase.
Option D is correct because cleaning up the cache before building frees up disk space. Option A is wrong because CodeBuild does not allow mounting EBS volumes. Option B is wrong because EFS cache is not supported. Option C is wrong because the instance type cannot be changed. The error is due to disk space exhaustion, and clearing the cache resolves it.
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 a command in the buildspec.yml to clean the cache directory before the build phase.
Why this is correct
Cleaning the cache frees up disk space, resolving the 'No space left on device' error.
Related concept
Read the scenario before looking for a memorised answer.
✗
Use an Amazon EFS file system as a cache to store dependencies.
Why it's wrong here
CodeBuild does not support EFS as a cache location.
✗
Change the compute type to general1.medium with 8 GB disk space.
Why it's wrong here
The compute type cannot be changed to a different family; also, general1.medium has less CPU/memory.
✗
Mount an additional Amazon EBS volume to the build container.
Why it's wrong here
CodeBuild does not support mounting EBS volumes to build containers.
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 DVA-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.
Deployment — This question tests Deployment — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Add a command in the buildspec.yml to clean the cache directory before the build phase. — Option D is correct because cleaning up the cache before building frees up disk space. Option A is wrong because CodeBuild does not allow mounting EBS volumes. Option B is wrong because EFS cache is not supported. Option C is wrong because the instance type cannot be changed. The error is due to disk space exhaustion, and clearing the cache resolves it.
What should I do if I get this DVA-C02 question wrong?
Identify which DVA-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 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
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