Quick Answer
The correct answer is to define a batch build with multiple builds, as AWS CodeBuild’s batch build feature allows you to run unit tests in parallel across multiple build environments simultaneously. This is achieved by configuring a `batch` section in your buildspec file, where you can specify a dynamic or static list of builds, each with its own environment, enabling true parallel execution and faster test cycles. On the AWS Certified DevOps Engineer Professional DOP-C02 exam, this concept tests your understanding of optimizing CI/CD pipelines for speed and resource efficiency, often appearing in scenario-based questions where you must choose between batch builds, sequential builds, or using a matrix. A common trap is confusing batch builds with CodePipeline parallel actions—remember that batch builds are CodeBuild-native and controlled within the buildspec, not the pipeline. Memory tip: think “batch = parallel batch of builds” to instantly recall that the `batch` keyword in the buildspec is your key to running unit tests in parallel.
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 wants to run unit tests in parallel across multiple build environments using AWS CodeBuild. Which build specification configuration allows this?
Use multiple build phases in the buildspec file.
Why wrong: Phases run sequentially within a single build.
Configure multiple artifacts in the buildspec.
Why wrong: Artifacts are outputs, not execution.
Define a batch build with multiple builds.
Batch builds run multiple builds in parallel.
Set environment variables to run multiple commands concurrently.
Why wrong: Environment variables do not enable parallelism.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Define a batch build with multiple builds.
Option C is correct because AWS CodeBuild supports batch builds, which allow you to define a build project that runs multiple builds in parallel. By specifying a batch configuration in your buildspec file (using the `batch` section), you can run unit tests across multiple build environments simultaneously, improving test execution speed and resource utilization.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
Use multiple build phases in the buildspec file.
Why it's wrong here
Phases run sequentially within a single build.
Configure multiple artifacts in the buildspec.
Why it's wrong here
Artifacts are outputs, not execution.
Define a batch build with multiple builds.
Why this is correct
Batch builds run multiple builds in parallel.
Related concept
Read the scenario before looking for a memorised answer.
Set environment variables to run multiple commands concurrently.
Why it's wrong here
Environment variables do not enable parallelism.
Common exam traps
The trap here is that candidates confuse sequential build phases with parallel execution, or assume that environment variables or multiple artifacts can achieve parallelism, when only the batch build feature in CodeBuild provides true parallel builds across multiple environments.
Trap categories for this question
Command / output trap
Artifacts are outputs, not execution.
Detailed technical explanation
Under the hood, AWS CodeBuild batch builds use a `build-list` or `build-matrix` configuration in the buildspec to define multiple builds that run concurrently. Each build in the batch can have its own environment variables, compute type, and image, allowing true parallel execution across isolated build environments. This is particularly useful for running unit tests against different operating systems, language versions, or dependency sets without waiting for sequential builds.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
A cloud solutions architect for a retail company is evaluating services for a new workload. The correct answer here reflects best practice for the specific scenario described — not a general cloud recommendation. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Cloud exam questions reward reading the constraint carefully: the same technology can be right or wrong depending on the use case.
What to study next
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
SDLC Automation — study guide chapter
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FAQ
SDLC Automation — This question tests SDLC Automation — Read the scenario before looking for a memorised answer..
The correct answer is: Define a batch build with multiple builds. — Option C is correct because AWS CodeBuild supports batch builds, which allow you to define a build project that runs multiple builds in parallel. By specifying a batch configuration in your buildspec file (using the `batch` section), you can run unit tests across multiple build environments simultaneously, improving test execution speed and resource utilization.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 24, 2026
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.
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