← DOP-C02·Amazon Web Services

Question 129 of 1,740

SDLC Automation →mediumMultiple SelectObjective-mapped

Quick Answer

The correct answer is enabling Amazon S3 cache to store dependencies and reuse them across builds, combined with configuring a custom VPC for the CodeBuild project. Using an S3 cache dramatically improves build performance by avoiding redundant downloads of dependencies like Maven or npm packages, while a custom VPC enhances security by allowing the build environment to access private resources—such as internal databases or services—without traversing the public internet. On the AWS Certified DevOps Engineer Professional DOP-C02 exam, this pairing tests your understanding of how to balance speed and isolation in CI/CD pipelines; a common trap is assuming public internet access is always required for builds. Remember the mnemonic “Cache for speed, VPC for need”—S3 cache accelerates, and the VPC keeps traffic contained.

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.

Which TWO best practices should be followed when configuring AWS CodeBuild projects to improve build performance and security? (Choose TWO.)

Clue words in this question

Noticing these words before you look at the options changes how you read each choice.

Clue: "best"
Why it matters: Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.

Question 1mediummulti select

Full question →

A
Run builds as the root user to avoid permission errors
Why wrong: Running as root is a security risk; use a non-root user.
B
Use the AWS managed policy 'AdministratorAccess' for the CodeBuild service role to avoid permission issues
Why wrong: Least privilege should be applied; admin access is a security risk.
C
Configure the build project to use a custom VPC to access resources like private Amazon RDS databases
VPC enables secure access to private resources and is a best practice for security.
D
Always use the 'latest' tag for the build environment image to ensure up-to-date software
Why wrong: Using 'latest' can introduce breaking changes and security issues; pin to a specific version.
E
Enable Amazon S3 cache to store dependencies and reuse them across builds
S3 cache improves build speed by avoiding re-downloading dependencies.

Full breakdown with real-world context →

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

✓

Configure the build project to use a custom VPC to access resources like private Amazon RDS databases

Option C is correct because configuring a CodeBuild project to use a custom VPC allows it to access resources that are not publicly accessible, such as private Amazon RDS databases or internal services, which is essential for building applications that depend on those resources. This also enhances security by keeping traffic within the VPC and avoiding exposure to the public internet.

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.

✗
Run builds as the root user to avoid permission errors
Why it's wrong here
Running as root is a security risk; use a non-root user.
✗
Use the AWS managed policy 'AdministratorAccess' for the CodeBuild service role to avoid permission issues
Why it's wrong here
Least privilege should be applied; admin access is a security risk.
✓
Configure the build project to use a custom VPC to access resources like private Amazon RDS databases
Why this is correct
VPC enables secure access to private resources and is a best practice for security.
Clue confirmation
The clue word "best" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
Always use the 'latest' tag for the build environment image to ensure up-to-date software
Why it's wrong here
Using 'latest' can introduce breaking changes and security issues; pin to a specific version.
✓
Enable Amazon S3 cache to store dependencies and reuse them across builds
Why this is correct
S3 cache improves build speed by avoiding re-downloading dependencies.
Clue confirmation
The clue word "best" in the question point toward this answer.
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 'improving performance' with 'simplifying configuration' and choose options like using the 'latest' tag or granting broad permissions, overlooking the security and determinism trade-offs.

Detailed technical explanation

How to think about this question

When a CodeBuild project is configured with a custom VPC, it creates an elastic network interface (ENI) in the specified subnet, allowing the build container to communicate with resources inside the VPC via private IP addresses. This is critical for scenarios such as connecting to an Amazon RDS instance that is not publicly accessible or pulling source code from a private CodeCommit repository without traversing the internet. Additionally, enabling Amazon S3 cache (Option E) stores build dependencies like Maven or npm packages in a designated S3 bucket, reducing download times and network overhead on subsequent builds, which directly improves build performance.

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.

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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: Configure the build project to use a custom VPC to access resources like private Amazon RDS databases — Option C is correct because configuring a CodeBuild project to use a custom VPC allows it to access resources that are not publicly accessible, such as private Amazon RDS databases or internal services, which is essential for building applications that depend on those resources. This also enhances security by keeping traffic within the VPC and avoiding exposure to the public internet.

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.

Are there clue words in this question I should notice?

Yes — watch for: "best". Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.

What is the key concept behind this question?

Read the scenario before looking for a memorised answer.

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This DOP-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 DOP-C02 exam.