The answer is to attach the ACR to AKS or grant the kubelet managed identity the AcrPull role. This is correct because it enables password-less authentication by leveraging Azure AD managed identities, allowing the AKS cluster’s kubelet to authenticate with ACR using Azure Resource Manager tokens instead of storing registry passwords in Kubernetes secrets. On the AZ-204 exam, this scenario tests your understanding of secure image pull workflows and managed identity integration, often appearing as a distractor where candidates might incorrectly choose service principals or static secrets. A common trap is assuming a Kubernetes secret is required for any registry access, but the managed identity approach eliminates that need entirely. Remember the memory tip: “No secret, just AcrPull” — if you see a question about pulling images without passwords, think managed identity and the AcrPull role assignment.
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 image resize worker 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 B is correct because attaching an ACR to an AKS cluster or granting the kubelet managed identity the AcrPull role eliminates the need to store registry passwords in Kubernetes secrets. This leverages Azure AD managed identities for secure, password-less authentication, where the AKS cluster's kubelet uses its managed identity to authenticate with ACR via Azure Resource Manager tokens. The AcrPull role assignment authorizes the identity to pull images, ensuring credentials are never exposed in manifests or secrets.
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.
✗
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.
✗
Use an App Service deployment slot
Why it's wrong here
Deployment slots do not control AKS image-pull authentication.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates may think storing credentials in Kubernetes secrets (option A) is acceptable, but the question explicitly forbids that, and they might overlook the managed identity integration as the secure, password-less alternative.
Detailed technical explanation
How to think about this question
Under the hood, when ACR is attached to AKS, the cluster's kubelet is assigned a managed identity that requests an Azure Resource Manager token for the ACR endpoint (e.g., https://{registry}.azurecr.io). The token is exchanged for an OAuth2 token via the ACR OAuth2 exchange endpoint, enabling the kubelet to pull images without any stored secrets. In a real-world scenario, if the ACR is in a different Azure AD tenant, you must configure cross-tenant authentication using a service principal with AcrPull, but managed identity remains the preferred approach within the same tenant.
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 B is correct because attaching an ACR to an AKS cluster or granting the kubelet managed identity the AcrPull role eliminates the need to store registry passwords in Kubernetes secrets. This leverages Azure AD managed identities for secure, password-less authentication, where the AKS cluster's kubelet uses its managed identity to authenticate with ACR via Azure Resource Manager tokens. The AcrPull role assignment authorizes the identity to pull images, ensuring credentials are never exposed in manifests or secrets.
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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