- A
Create a single pipeline with a parallel action for unit tests, then a serial stage for integration tests
Parallel unit tests reduce time; integration tests run after all unit tests succeed.
- B
Create a single pipeline with a serial stage for unit tests, then integration tests
Why wrong: Serial unit tests would run sequentially, increasing pipeline duration.
- C
Create one pipeline per microservice, each triggering integration tests via SNS
Why wrong: Multiple pipelines would require custom coordination for integration tests.
- D
Use AWS CodeBuild batch builds with a fan-out/fan-in pattern
Why wrong: CodeBuild batch builds are for multiple build configurations, not for coordinating pipeline stages.
Question 1,241 of 1,750
CodePipeline Stage Design — Parallel Unit Tests Followed by Serial Integration Tests
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 DevOps engineer is designing a CI/CD pipeline for a microservices application using AWS CodePipeline. Each microservice has its own CodeCommit repository. The engineer wants to run unit tests in parallel for all services when any repository receives a push, then run integration tests only after all unit tests pass. Which pipeline structure should the engineer use?
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
✓
Create a single pipeline with a parallel action for unit tests, then a serial stage for integration tests
Option A is correct because AWS CodePipeline supports parallel actions within a stage, allowing unit tests for all microservices to run concurrently. After all unit tests succeed, the pipeline transitions to a serial stage for integration tests, ensuring the correct dependency order. This structure minimizes build time while enforcing the required sequential gate.
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.
- ✓
Create a single pipeline with a parallel action for unit tests, then a serial stage for integration tests
Why this is correct
Parallel unit tests reduce time; integration tests run after all unit tests succeed.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Create a single pipeline with a serial stage for unit tests, then integration tests
Why it's wrong here
Serial unit tests would run sequentially, increasing pipeline duration.
- ✗
Create one pipeline per microservice, each triggering integration tests via SNS
Why it's wrong here
Multiple pipelines would require custom coordination for integration tests.
- ✗
Use AWS CodeBuild batch builds with a fan-out/fan-in pattern
Why it's wrong here
CodeBuild batch builds are for multiple build configurations, not for coordinating pipeline stages.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse parallel actions within a stage with parallel stages, or assume that separate pipelines are needed for each microservice, overlooking CodePipeline's ability to run multiple actions concurrently in a single stage.
Detailed technical explanation
How to think about this question
CodePipeline stages are sequential by default, but actions within a stage can be configured to run in parallel by setting the 'RunOrder' property to the same value. For this use case, each microservice's unit test action would have RunOrder: 1, and the integration test stage would have RunOrder: 2, ensuring all unit tests finish before integration tests begin. Under the hood, CodePipeline uses CloudWatch Events to detect repository pushes and automatically starts the pipeline, with each action polling its provider (e.g., CodeBuild) for completion status.
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 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
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: Create a single pipeline with a parallel action for unit tests, then a serial stage for integration tests — Option A is correct because AWS CodePipeline supports parallel actions within a stage, allowing unit tests for all microservices to run concurrently. After all unit tests succeed, the pipeline transitions to a serial stage for integration tests, ensuring the correct dependency order. This structure minimizes build time while enforcing the required sequential gate.
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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