- A
Enable Amazon S3 caching in the CodeBuild project and specify an S3 bucket to store the cache.
S3 caching allows dependencies to be stored and reused across builds.
- B
Use CodeBuild's 'build cache' feature without specifying a bucket; it will automatically cache to a default location.
Why wrong: CodeBuild requires explicit cache configuration; there is no default location.
- C
Set the cache type to 'Local' in the CodeBuild project configuration.
Why wrong: CodeBuild supports local caching only for Docker layers, not Maven dependencies.
- D
Mount an Amazon EFS file system to the build container and configure Maven to use it as a local repository.
Why wrong: EFS can be used but is not the simplest or recommended caching method for CodeBuild.
- E
Configure the buildspec file to save the Maven local repository (.m2) to the cache path.
The buildspec must specify which paths to cache, e.g., /root/.m2.
DOP-C02 SDLC Automation Practice Question
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 is using AWS CodeBuild to run builds for a Java application. The build takes a long time because it downloads Maven dependencies every time. The team wants to speed up the build by caching dependencies. Which TWO actions should be taken? (Choose 2)
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 Amazon S3 caching in the CodeBuild project and specify an S3 bucket to store the cache.
Option A is correct because CodeBuild supports Amazon S3 caching, which allows you to store build artifacts (such as Maven dependencies) in a specified S3 bucket. By enabling this feature, subsequent builds can download the cached dependencies from S3 instead of re-downloading them from the internet, significantly reducing build time. Option E is correct because the buildspec file must explicitly define the cache path (e.g., /root/.m2) to tell CodeBuild which directory to cache; without this, CodeBuild does not know what to save or restore.
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.
- ✓
Enable Amazon S3 caching in the CodeBuild project and specify an S3 bucket to store the cache.
Why this is correct
S3 caching allows dependencies to be stored and reused across builds.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Use CodeBuild's 'build cache' feature without specifying a bucket; it will automatically cache to a default location.
Why it's wrong here
CodeBuild requires explicit cache configuration; there is no default location.
- ✗
Set the cache type to 'Local' in the CodeBuild project configuration.
Why it's wrong here
CodeBuild supports local caching only for Docker layers, not Maven dependencies.
- ✗
Mount an Amazon EFS file system to the build container and configure Maven to use it as a local repository.
Why it's wrong here
EFS can be used but is not the simplest or recommended caching method for CodeBuild.
- ✓
Configure the buildspec file to save the Maven local repository (.m2) to the cache path.
Why this is correct
The buildspec must specify which paths to cache, e.g., /root/.m2.
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 often assume CodeBuild has a built-in local cache that works automatically without configuration, but in reality, you must explicitly define the cache path in the buildspec and choose between S3 or local caching (local caching is only available for certain build environments and still requires the buildspec path).
Detailed technical explanation
How to think about this question
CodeBuild's S3 caching works by compressing the specified cache path (e.g., /root/.m2) into a tar.gz file and storing it in the configured S3 bucket. On subsequent builds, CodeBuild downloads and extracts this archive into the build container before the build starts, allowing Maven to reuse previously downloaded dependencies. The cache key is derived from the project and optionally the source hash, ensuring that cache invalidation occurs when dependencies change. This approach is efficient because S3 provides high-throughput, low-latency access, and the cache can be shared across multiple build environments.
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.
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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 Amazon S3 caching in the CodeBuild project and specify an S3 bucket to store the cache. — Option A is correct because CodeBuild supports Amazon S3 caching, which allows you to store build artifacts (such as Maven dependencies) in a specified S3 bucket. By enabling this feature, subsequent builds can download the cached dependencies from S3 instead of re-downloading them from the internet, significantly reducing build time. Option E is correct because the buildspec file must explicitly define the cache path (e.g., /root/.m2) to tell CodeBuild which directory to cache; without this, CodeBuild does not know what to save or restore.
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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