The answer is to attach the ACR to AKS or grant the kubelet managed identity the AcrPull role. This is correct because it enables Azure AD-based authentication for pulling images from Azure Container Registry without ever storing registry passwords in Kubernetes secrets. The kubelet on each node uses its own managed identity to obtain a short-lived ACR access token via Azure AD, allowing secure, passwordless image pulls that follow Azure security best practices. On the AZ-204 exam, this scenario tests your understanding of managed identities and Azure-integrated authentication for container workloads—a common trap is thinking you need a Kubernetes secret or service principal, but the exam wants you to recognize that AKS can natively authenticate to ACR when the kubelet identity is assigned the AcrPull role. Memory tip: think “kubelet gets AcrPull” to remember that the node’s identity, not a stored secret, handles the pull.
AZ-204 Develop Azure compute solutions Practice Question
This AZ-204 practice question tests your understanding of develop azure compute solutions. 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 Kubernetes-based IoT command API on AKS must pull images from Azure Container Registry without storing registry passwords in Kubernetes secrets. What should be used?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Attach the ACR to AKS or grant the kubelet managed identity AcrPull
Option C is correct because attaching an ACR to an AKS cluster or granting the kubelet managed identity the AcrPull role enables Azure AD-based authentication without storing credentials in Kubernetes secrets. The kubelet on each node uses its managed identity to obtain an ACR access token via Azure AD, allowing secure image pulls. This approach eliminates the need for manual password management and follows security best practices for Azure-integrated workloads.
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.
✗
Use an App Service deployment slot
Why it's wrong here
Deployment slots do not control AKS image-pull authentication.
✗
Store the ACR admin password in every deployment manifest
Attach the ACR to AKS or grant the kubelet managed identity AcrPull
Why this is correct
AKS can authenticate to ACR through managed identity permissions such as AcrPull.
Related concept
Read the scenario before looking for a memorised answer.
✗
Make the container registry public
Why it's wrong here
Public access exposes images unnecessarily.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates may confuse AKS authentication with App Service features or assume that making the registry public is acceptable for development, when in fact Azure AD managed identity with AcrPull is the secure, recommended approach for production workloads.
Detailed technical explanation
How to think about this question
Under the hood, when ACR is attached to AKS, the kubelet uses its Azure Managed Identity to request an ACR access token via the Azure Resource Manager REST API (https://management.azure.com/subscriptions/{subId}/resourceGroups/{rg}/providers/Microsoft.ContainerRegistry/registries/{acrName}/listCredentials?api-version=2019-05-01). The token is then used for docker login, and the kubelet refreshes it automatically before expiry (typically 3 hours). In a real-world scenario, this enables zero-trust security where nodes authenticate as themselves rather than sharing a common secret, and it integrates seamlessly with Azure Policy for compliance.
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 company's IT admin needs to give a contractor read-only access to production logs without sharing account credentials. Using role-based access control (RBAC) and temporary scoped permissions — not a permanent shared password — is the correct pattern. Questions like this test whether you can apply least-privilege access across cloud identity services.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this AZ-204 question in full detail.
Develop Azure compute solutions — This question tests Develop Azure compute solutions — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Attach the ACR to AKS or grant the kubelet managed identity AcrPull — Option C is correct because attaching an ACR to an AKS cluster or granting the kubelet managed identity the AcrPull role enables Azure AD-based authentication without storing credentials in Kubernetes secrets. The kubelet on each node uses its managed identity to obtain an ACR access token via Azure AD, allowing secure image pulls. This approach eliminates the need for manual password management and follows security best practices for Azure-integrated workloads.
What should I do if I get this AZ-204 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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