- A
Increase the compute capacity of the test environment
Why wrong: Larger instances may speed up individual tests but not parallelize
- B
Configure the test stage with parallel actions in CodePipeline
Parallel actions run simultaneously, reducing total time
- C
Use AWS CodeBuild batch builds with a single buildspec
Why wrong: Batch builds are for running multiple builds, not parallel test execution within a stage
- D
Create multiple pipelines, each running a subset of tests
Why wrong: Multiple pipelines would require separate triggers and management
Question 441 of 1,750
Running Tests in Parallel Using CodePipeline Parallel Actions to Speed Up CI/CD
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 company uses AWS CodePipeline with multiple stages: source, build, test, and deploy. The test stage takes 45 minutes to complete. Developers complain that the pipeline takes too long to provide feedback. The team wants to run tests in parallel across multiple environments. Which approach should be taken to reduce the pipeline execution time?
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 test stage with parallel actions in CodePipeline
Option B is correct because AWS CodePipeline supports parallel actions within a stage, allowing multiple test environments (e.g., different OS or browser configurations) to run simultaneously. This reduces the overall pipeline execution time from the sum of sequential tests to the duration of the longest single test (45 minutes), provided the parallel actions are independent. By configuring the test stage with parallel actions, the team can achieve faster feedback without altering the underlying test logic or infrastructure.
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.
- ✗
Increase the compute capacity of the test environment
Why it's wrong here
Larger instances may speed up individual tests but not parallelize
- ✓
Configure the test stage with parallel actions in CodePipeline
Why this is correct
Parallel actions run simultaneously, reducing total time
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Use AWS CodeBuild batch builds with a single buildspec
Why it's wrong here
Batch builds are for running multiple builds, not parallel test execution within a stage
- ✗
Create multiple pipelines, each running a subset of tests
Why it's wrong here
Multiple pipelines would require separate triggers and management
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates confuse parallel actions within a pipeline stage (which is a CodePipeline feature) with increasing compute resources or using batch builds, which address different bottlenecks (compute speed vs. parallel execution).
Detailed technical explanation
How to think about this question
Under the hood, CodePipeline parallel actions use the same stage's 'runOrder' property; actions with the same runOrder value execute concurrently, while those with different runOrder values run sequentially. This is distinct from CodeBuild batch builds, which use a 'buildspec' with a 'batch' configuration to run multiple builds in parallel but are limited to a single build project. In a real-world scenario, a team might run Selenium tests across Chrome, Firefox, and Safari in parallel using separate CodeBuild projects as parallel actions, cutting total test time from 135 minutes (3 x 45) to 45 minutes.
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
An e-commerce site experiences heavy traffic on Black Friday and near-zero traffic during off-peak weeks. Rather than provisioning permanent large VMs, the team uses auto-scaling groups that add capacity automatically under load and reduce it overnight. Questions like this test whether you understand elasticity, availability zones, and cloud compute scaling patterns.
What to study next
Got this wrong? Here's your next step.
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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: Configure the test stage with parallel actions in CodePipeline — Option B is correct because AWS CodePipeline supports parallel actions within a stage, allowing multiple test environments (e.g., different OS or browser configurations) to run simultaneously. This reduces the overall pipeline execution time from the sum of sequential tests to the duration of the longest single test (45 minutes), provided the parallel actions are independent. By configuring the test stage with parallel actions, the team can achieve faster feedback without altering the underlying test logic or infrastructure.
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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