This AZ-400 practice question tests your understanding of design and implement build and release pipelines. 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 triggers can start a release in Azure Pipelines?
Continuous integration
Why wrong: Continuous integration triggers are for builds, not releases.
Schedule
A schedule trigger starts a release at a specified time.
Build completion
A build completion trigger automatically creates a release when a build artifact is produced.
Work item state change
Why wrong: Work item state changes are not a native trigger for releases.
Pull request
Why wrong: Pull request triggers are for builds, not releases.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Schedule
In Azure Pipelines, a release can be triggered by a schedule, which allows you to define a cron-based trigger to deploy at specific times (e.g., nightly builds). The 'Build completion' trigger starts a release when a specific build pipeline completes, enabling chained deployments. Both are native release triggers in classic release pipelines.
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.
Continuous integration
Why it's wrong here
Continuous integration triggers are for builds, not releases.
Schedule
Why this is correct
A schedule trigger starts a release at a specified time.
Related concept
Read the scenario before looking for a memorised answer.
Build completion
Why this is correct
A build completion trigger automatically creates a release when a build artifact is produced.
Related concept
Read the scenario before looking for a memorised answer.
Work item state change
Why it's wrong here
Work item state changes are not a native trigger for releases.
Pull request
Why it's wrong here
Pull request triggers are for builds, not releases.
Common exam traps
The trap here is that candidates confuse triggers that apply to build pipelines (CI, PR) with those that apply to release pipelines, leading them to select 'Continuous integration' or 'Pull request' as valid release triggers.
Detailed technical explanation
Under the hood, Azure Pipelines release triggers rely on artifact sources and environment triggers. A 'Schedule' trigger uses a cron expression (e.g., '0 0 * * *' for daily midnight) to evaluate whether to create a release, while 'Build completion' listens for a specific build pipeline's completion event via the Azure DevOps REST API. In real-world scenarios, you might combine a schedule trigger for staging deployments and a build completion trigger for production to ensure only validated artifacts are released.
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
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FAQ
Design and implement build and release pipelines — This question tests Design and implement build and release pipelines — Read the scenario before looking for a memorised answer..
The correct answer is: Schedule — In Azure Pipelines, a release can be triggered by a schedule, which allows you to define a cron-based trigger to deploy at specific times (e.g., nightly builds). The 'Build completion' trigger starts a release when a specific build pipeline completes, enabling chained deployments. Both are native release triggers in classic release pipelines.
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 25, 2026
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