- A
Configure the buildspec file to use Docker layer caching
Why wrong: Docker layer caching is for Docker images, not Java dependencies.
- B
Use the CodeBuild cache configuration to store the entire build output in a custom Docker image
Why wrong: This is not about dependency caching.
- C
Store dependencies in an Amazon S3 bucket and download them at the start of each build
Why wrong: This is manual and not integrated with CodeBuild's caching mechanism.
- D
Enable local caching in the CodeBuild project and specify the cache location as /root/.m2
Local caching reuses files from previous builds on the same build agent.
Question 168 of 1,750
DOP-C02 SDLC Automation Practice Question
This DOP-C02 practice question tests your understanding of sdlc automation. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. 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 team uses AWS CodeBuild to compile a Java application. The build environment is managed by AWS and runs on Linux. The team wants to speed up the build process by caching dependency directories across builds. Which configuration should the team use?
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
✓
Enable local caching in the CodeBuild project and specify the cache location as /root/.m2
Option D is correct because AWS CodeBuild supports local caching, which stores specified directories on the build host's local instance storage. By configuring the cache type as 'local' and specifying the cache location as `/root/.m2` (the default Maven local repository), the team can persist downloaded Maven dependencies across builds, significantly reducing build time by avoiding re-downloading 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.
- ✗
Configure the buildspec file to use Docker layer caching
Why it's wrong here
Docker layer caching is for Docker images, not Java dependencies.
- ✗
Use the CodeBuild cache configuration to store the entire build output in a custom Docker image
Why it's wrong here
This is not about dependency caching.
- ✗
Store dependencies in an Amazon S3 bucket and download them at the start of each build
Why it's wrong here
This is manual and not integrated with CodeBuild's caching mechanism.
- ✓
Enable local caching in the CodeBuild project and specify the cache location as /root/.m2
Why this is correct
Local caching reuses files from previous builds on the same build agent.
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 Docker layer caching (used for container image builds) with local caching for dependency directories, or assume that S3 caching is the only option, overlooking the simpler and faster local cache feature.
Detailed technical explanation
How to think about this question
CodeBuild's local caching uses the build instance's ephemeral storage (e.g., `/tmp` or instance store) to persist cache directories between builds on the same build environment. The cache is stored in a compressed tar file and restored on subsequent builds; however, it is not shared across different build environments or regions. For Maven, the `-Dmaven.repo.local` property or the default `~/.m2` directory is used, and specifying `/root/.m2` ensures the local repository is cached, avoiding re-fetching dependencies from remote repositories like Maven Central.
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.
Quick reference
AWS S3 Storage Class Comparison
| Storage Class | Min Duration | Retrieval | Use Case |
|---|---|---|---|
| S3 Standard | None | Immediate | Frequently accessed data |
| S3 Standard-IA | 30 days | Immediate | Infrequent access, rapid retrieval |
| S3 One Zone-IA | 30 days | Immediate | Non-critical infrequent data |
| S3 Intelligent-Tiering | None | Immediate–hours | Unknown or changing access patterns |
| S3 Glacier Instant | 90 days | Milliseconds | Archive with instant retrieval |
| S3 Glacier Flexible | 90 days | Minutes–hours | Archive, flexible retrieval |
| S3 Glacier Deep Archive | 180 days | Hours | Long-term compliance archive |
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.
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SDLC Automation — study guide chapter
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FAQ
Questions learners often ask
What does this DOP-C02 question test?
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 CodeBuild project and specify the cache location as /root/.m2 — Option D is correct because AWS CodeBuild supports local caching, which stores specified directories on the build host's local instance storage. By configuring the cache type as 'local' and specifying the cache location as `/root/.m2` (the default Maven local repository), the team can persist downloaded Maven dependencies across builds, significantly reducing build time by avoiding re-downloading dependencies.
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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Last reviewed: Jul 4, 2026
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