Quick Answer
The answer is Azure Disks, which is the correct choice because it provides block-level storage volumes that can be dynamically provisioned via the AKS built-in StorageClass, supporting the ReadWriteOnce access mode required for a single pod in a containerized microservices application. Azure Disks integrate directly with Kubernetes PersistentVolumeClaims (PVCs) for dynamic provisioning, offering low-latency, high-performance storage suitable for stateful workloads. On the Microsoft Azure Solutions Architect Expert AZ-305 exam, this scenario tests your understanding of matching storage access modes to pod requirements—specifically that Azure Disks support only ReadWriteOnce, while Azure Files supports ReadWriteMany. A common trap is choosing Azure Files for dynamic provisioning, but the key distinction is that microservices needing block storage for a single pod point to Azure Disks. Memory tip: think “Disk for a single pod, File for the flock”—Azure Disks attach to one node at a time, making them ideal for stateful sets with dynamic provisioning.
This AZ-305 practice question tests your understanding of design data storage 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 company is deploying a containerized microservices application on Azure Kubernetes Service (AKS). The application requires persistent storage that can be attached to pods and supports dynamic provisioning. Which Azure storage solution should they use?
Azure Blob Storage
Why wrong: Azure Blob Storage requires additional CSI drivers for AKS.
Azure Files
Why wrong: Azure Files is suitable for shared access but not the best for dynamic provisioning of persistent volumes.
Azure NetApp Files
Why wrong: Azure NetApp Files is for high-performance workloads and is more expensive.
Azure Disks
Azure Disks support dynamic provisioning via StorageClass and are commonly used with AKS.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Azure Disks
Azure Disks is the correct choice because it provides block-level storage volumes that can be dynamically provisioned via the AKS built-in StorageClass, supporting ReadWriteOnce access mode required for a single pod in a containerized microservices application. Azure Disks integrate directly with Kubernetes PersistentVolumeClaims (PVCs) for dynamic provisioning, offering low-latency, high-performance storage suitable for stateful workloads.
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.
Azure Blob Storage
Why it's wrong here
Azure Blob Storage requires additional CSI drivers for AKS.
Azure Files
Why it's wrong here
Azure Files is suitable for shared access but not the best for dynamic provisioning of persistent volumes.
Azure NetApp Files
Why it's wrong here
Azure NetApp Files is for high-performance workloads and is more expensive.
Azure Disks
Why this is correct
Azure Disks support dynamic provisioning via StorageClass and are commonly used with AKS.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
The trap here is that candidates often confuse Azure Files (shared file storage) with Azure Disks (block storage), assuming that 'persistent storage' always means file shares, but for single-pod dynamic provisioning in AKS, Azure Disks are the native and optimal choice.
Detailed technical explanation
Under the hood, Azure Disks are implemented as managed VHDs that map to the pod's node via the Azure Disk CSI driver, supporting both managed and unmanaged disks with SKUs like Premium SSD, Standard SSD, and Ultra Disk. Dynamic provisioning relies on the default 'managed-csi' StorageClass in AKS, which automatically creates a disk in the same region as the node and attaches it via the Azure Disk CSI driver's CreateVolume and ControllerPublishVolume RPCs. A real-world scenario where this matters is a stateful microservice like a database (e.g., PostgreSQL on AKS) requiring low-latency writes; using Azure Disks with Premium SSD ensures consistent IOPS and throughput, whereas Azure Files would introduce higher latency due to SMB protocol overhead.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
A media company stores terabytes of video archives that are accessed once a year for audit purposes. Moving these objects to a cold storage tier (Azure Archive, S3 Glacier, or Google Nearline) costs a fraction of hot storage. Questions like this test whether you understand storage tiers, access frequency tradeoffs, and retrieval latency requirements.
What to study next
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FAQ
Design data storage solutions — This question tests Design data storage solutions — Read the scenario before looking for a memorised answer..
The correct answer is: Azure Disks — Azure Disks is the correct choice because it provides block-level storage volumes that can be dynamically provisioned via the AKS built-in StorageClass, supporting ReadWriteOnce access mode required for a single pod in a containerized microservices application. Azure Disks integrate directly with Kubernetes PersistentVolumeClaims (PVCs) for dynamic provisioning, offering low-latency, high-performance storage suitable for stateful workloads.
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 24, 2026
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