This DOP-C02 practice question tests your understanding of sdlc automation. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. 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 compile and test code. The build takes 30 minutes, but the team wants to reduce build time by caching dependencies. Which approach should be used?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Enable local caching in the build project configuration.
Option D is correct because AWS CodeBuild's local caching feature allows you to cache intermediate build artifacts (such as dependencies) in a local directory on the build instance, which persists across builds for the same build project. This eliminates the need to re-download dependencies from external sources for every build, significantly reducing build time. The cache is stored in a Docker volume or S3 bucket, but the key benefit is that it is automatically managed by CodeBuild without manual download steps.
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.
✗
Remove unnecessary dependencies from the build specification.
Why it's wrong here
Removing dependencies may cause build failures if they are actually needed.
✗
Store dependencies in an S3 bucket and download them before each build.
Why it's wrong here
S3 caching is not a built-in CodeBuild feature; it would require custom scripting.
✗
Use AWS CodeArtifact to store dependencies and pull them during build.
Why it's wrong here
CodeArtifact is a package repository, not a build cache.
✓
Enable local caching in the build project configuration.
Why this is correct
CodeBuild local caching stores dependencies in a cache directory that persists across builds.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates may confuse caching with simply storing artifacts externally (like S3 or CodeArtifact) and fail to recognize that CodeBuild's local caching is the only option that eliminates the download overhead by persisting dependencies on the build instance itself.
Detailed technical explanation
How to think about this question
CodeBuild local caching works by specifying a cache type (e.g., LOCAL) in the build project configuration, which stores the cache in a Docker volume that persists across builds for the same project. The cache is automatically invalidated when the build specification changes, ensuring consistency. In real-world scenarios, teams often cache package manager directories (e.g., /root/.m2 for Maven, /root/.npm for npm) to avoid re-downloading dependencies, which can reduce build times from 30 minutes to under 5 minutes for dependency-heavy projects.
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.
TExam Day Tips
→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 media company stores terabytes of video archives that are accessed once a year for audit purposes. Moving these objects to a cold storage tier (Azure Archive, S3 Glacier, or Google Nearline) costs a fraction of hot storage. Questions like this test whether you understand storage tiers, access frequency tradeoffs, and retrieval latency requirements.
What to study next
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
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: Enable local caching in the build project configuration. — Option D is correct because AWS CodeBuild's local caching feature allows you to cache intermediate build artifacts (such as dependencies) in a local directory on the build instance, which persists across builds for the same build project. This eliminates the need to re-download dependencies from external sources for every build, significantly reducing build time. The cache is stored in a Docker volume or S3 bucket, but the key benefit is that it is automatically managed by CodeBuild without manual download steps.
What should I do if I get this DOP-C02 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Question Discussion
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