- A
Amazon DynamoDB
Why wrong: DynamoDB is a database, not a caching service for builds.
- B
Amazon EFS
Why wrong: EFS is not used for caching in CodeBuild.
- C
Amazon ECR
Why wrong: ECR is for container images, not for caching build dependencies.
- D
Local caching or Amazon S3 caching
CodeBuild supports local caching and S3 caching to speed up builds.
Question 682 of 1,616
Caching Dependencies in AWS CodeBuild
This DVA-C02 practice question tests your understanding of deployment. 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 team is using AWS CodeBuild to compile and test code. The build takes longer than expected. The team wants to reduce build times by caching dependencies. Which option should the team use to cache dependencies in CodeBuild?
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
✓
Local caching or Amazon S3 caching
Option D is correct because AWS CodeBuild supports two caching modes: local caching and Amazon S3 caching. Local caching stores dependencies on the build host's local file system, while S3 caching stores them in an S3 bucket. Both options reduce build times by reusing previously downloaded dependencies across builds, avoiding redundant downloads.
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.
- ✗
Amazon DynamoDB
Why it's wrong here
DynamoDB is a database, not a caching service for builds.
- ✗
Amazon EFS
Why it's wrong here
EFS is not used for caching in CodeBuild.
- ✗
Amazon ECR
Why it's wrong here
ECR is for container images, not for caching build dependencies.
- ✓
Local caching or Amazon S3 caching
Why this is correct
CodeBuild supports local caching and S3 caching to speed up 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 mechanisms with storage services like DynamoDB or EFS, or assume that ECR (used for container images) can cache dependencies, when CodeBuild specifically supports only local and S3 caching for dependency reuse.
Detailed technical explanation
How to think about this question
Under the hood, CodeBuild's local caching uses the build environment's /root/.m2 (for Maven) or /root/.npm (for Node.js) directories, which are preserved across builds in the same build project. S3 caching stores a compressed archive of the cache in a specified S3 bucket, which is downloaded and extracted at the start of each build. A subtle behavior is that local caching is faster but limited to the same build environment type, while S3 caching is slower but persists across environment changes and can be shared across multiple build 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.
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 DVA-C02 question test?
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: Local caching or Amazon S3 caching — Option D is correct because AWS CodeBuild supports two caching modes: local caching and Amazon S3 caching. Local caching stores dependencies on the build host's local file system, while S3 caching stores them in an S3 bucket. Both options reduce build times by reusing previously downloaded dependencies across builds, avoiding redundant downloads.
What should I do if I get this DVA-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
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.
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