AZ-400 Practice Question: Design and implement build and release pipelines
Network Topology
The pipeline fails with the error 'The resource with name 'myregistry' could not be found'. What is the most likely cause?
⚠ Common exam trap
AZ-400 often tests the distinction between resource-not-found errors and permission errors; candidates may incorrectly choose the service connection permission option when the error explicitly says the resource could not be found.
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
✓
The Azure Container Registry name is incorrect
The error 'The resource with name 'myregistry' could not be found' indicates that the pipeline is trying to reference an Azure Container Registry that does not exist or is misspelled. The most likely cause is that the registry name in the pipeline configuration is incorrect, such as a typo or wrong environment variable. This is a resource resolution error, not a permissions or tooling issue.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
The Azure Container Registry name is incorrect
Why this is correct
The error 'resource with name m' indicates Azure DevOps cannot locate the specified Azure Container Registry (ACR) resource, which means the registry name provided in the task or variable does not exist or is misspelled in the current subscription/tenant. A correct ACR name must exactly match the globally unique registry name (e.g., 'myregistry.azurecr.io' without the domain), and any typo or mismatch will result in a 'not found' exception, not an authentication or CLI failure.
- ✗
The build ID variable is not defined
Why it's wrong here
The build ID variable is unrelated to resource resolution; if it were undefined, you would see a pipeline evaluation error such as 'variable not found' or an empty string being passed, not an Azure Resource Manager error about a named resource. The error explicitly refers to a resource name, so the root cause is an invalid registry identifier, not a missing pipeline variable.
- ✗
The service connection does not have permission to access the registry
Why it's wrong here
Permissions issues with a service connection to ACR manifest as HTTP 401 Unauthorized or 403 Forbidden responses, such as 'Authentication failed' or 'Repository not found' when trying to access a registry that exists but the principal lacks Reader/Contributor roles. The stated error says the resource itself could not be found, which means the registry name lookup failed, not that access was denied to an existing resource.
- ✗
The Azure CLI is not installed on the agent
Why it's wrong here
If the Azure CLI were missing from the agent, the pipeline task would fail with a different error, such as 'az: command not found' or 'The Azure CLI is not installed on this agent', indicating a tooling issue. Here the failure is specifically about an Azure Resource Manager resource lookup, which uses the Azure REST API/ARM, not the Azure CLI; even if the CLI were installed, a nonexistent registry name would still produce the same 'not found' error.
Go deeper
Related to this question
Key term
Pipeline
A pipeline is an automated series of steps that takes code from development to production, ensuring quality and speed.
Key term
Environment
An environment is a dedicated set of computing resources, configurations, and services used to develop, test, or host software applications in a controlled and repeatable way.
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JA
Written and reviewed by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
Last reviewed September 2026 · checked against the official Microsoft exam blueprint
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