This DOP-C02 practice question tests your understanding of sdlc automation. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. 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.
Exhibit
Refer to the exhibit.
# AWS CLI output from 'aws codepipeline list-pipelines'
{
"pipelines": [
{
"name": "my-app-pipeline",
"version": 5,
"created": 1620000000.0,
"pipelineType": "V1",
"executionMode": "QUEUED"
}
]
}
Refer to the exhibit. A DevOps engineer sees this output when listing pipelines. The pipeline 'my-app-pipeline' has execution mode set to 'QUEUED'. The team reports that when multiple commits are pushed simultaneously, only the latest commit is deployed, and earlier ones are skipped. How should the pipeline execution mode be changed to ensure all commits are deployed?
Exhibit
Refer to the exhibit.
# AWS CLI output from 'aws codepipeline list-pipelines'
{
"pipelines": [
{
"name": "my-app-pipeline",
"version": 5,
"created": 1620000000.0,
"pipelineType": "V1",
"executionMode": "QUEUED"
}
]
}
A
Change the execution mode to 'SUPERSEDED'.
Why wrong: SUPERSEDED stops the current execution and starts a new one, which would skip commits.
B
Upgrade the pipeline to V2 type which supports 'QUEUED' mode.
Why wrong: QUEUED is the current mode; upgrading does not solve the issue.
C
Change the execution mode to 'SERIAL'.
Why wrong: SERIAL queues executions but still only one runs at a time, which could delay but not skip.
D
Change the execution mode to 'PARALLEL'.
PARALLEL allows multiple executions to run simultaneously for each commit.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Change the execution mode to 'PARALLEL'.
Option D is correct because setting the execution mode to 'PARALLEL' allows multiple pipeline executions to run concurrently, ensuring that each commit triggers its own independent execution. In contrast, 'QUEUED' mode (the current setting) only runs one execution at a time, and when multiple commits are pushed, later executions may supersede earlier ones in the queue, leading to only the latest commit being deployed. By switching to 'PARALLEL', every commit will be deployed without skipping any.
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.
✗
Change the execution mode to 'SUPERSEDED'.
Why it's wrong here
SUPERSEDED stops the current execution and starts a new one, which would skip commits.
✗
Upgrade the pipeline to V2 type which supports 'QUEUED' mode.
Why it's wrong here
QUEUED is the current mode; upgrading does not solve the issue.
✗
Change the execution mode to 'SERIAL'.
Why it's wrong here
SERIAL queues executions but still only one runs at a time, which could delay but not skip.
✓
Change the execution mode to 'PARALLEL'.
Why this is correct
PARALLEL allows multiple executions to run simultaneously for each commit.
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 'QUEUED' mode with 'SERIAL' or think that upgrading to V2 pipeline type changes the execution behavior, but the key is understanding that 'QUEUED' mode inherently supersedes older queued executions, while 'PARALLEL' mode runs all executions independently.
Detailed technical explanation
How to think about this question
In AWS CodePipeline, execution modes control how pipeline executions are handled when multiple triggers occur simultaneously. 'QUEUED' mode places executions in a queue and runs them one at a time, but if a newer execution is triggered while an older one is waiting, the older one is superseded (cancelled) unless it has already started. 'PARALLEL' mode allows multiple executions to run concurrently, up to the account limit, ensuring no commit is skipped. This behavior is critical in CI/CD workflows where every code change must be deployed, such as in microservices deployments or when using GitFlow with multiple feature branches.
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.
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: Change the execution mode to 'PARALLEL'. — Option D is correct because setting the execution mode to 'PARALLEL' allows multiple pipeline executions to run concurrently, ensuring that each commit triggers its own independent execution. In contrast, 'QUEUED' mode (the current setting) only runs one execution at a time, and when multiple commits are pushed, later executions may supersede earlier ones in the queue, leading to only the latest commit being deployed. By switching to 'PARALLEL', every commit will be deployed without skipping any.
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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Question Discussion
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