AZ-900 Describe cloud concepts Practice Question
A hospital maintains its patient records on physical servers located within its own on-premises data center due to strict data residency regulations that prohibit patient data from leaving the country. For analytical workloads that process only anonymized data, the hospital uses Azure virtual machines and Azure Synapse Analytics. This combination of on-premises and cloud resources best describes which cloud deployment model?
⚠ Common exam trap
The trap here is that candidates may mistakenly choose 'private cloud' because they associate on-premises infrastructure with private cloud, but the use of Azure public cloud services for analytics makes this a hybrid cloud, not a private cloud.
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
✓
Hybrid cloud
The hospital uses a combination of on-premises physical servers (for patient records due to data residency regulations) and Azure cloud resources (VMs and Synapse Analytics for anonymized data analytics). This integration of on-premises and public cloud services is the defining characteristic of a hybrid cloud deployment model, as it allows workloads to span both environments while maintaining compliance.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Public cloud
Why it's wrong here
A pure public cloud deployment runs all workloads, including patient records, on a third-party provider's infrastructure such as Azure, with no on-premises hardware for that data. Because the hospital still stores its patient records on physical servers, its footprint is not exclusively public; only a subset of workloads uses Azure. Public cloud also implies multi-tenancy and shared resources, which is not the case for the hospital's locally housed sensitive data.
When this WOULD be correct
A company runs all its workloads on Azure virtual machines and Azure SQL Database, with no on-premises infrastructure. The question asks for the deployment model where resources are provided over the internet and shared with other organizations.
- ✗
Private cloud
Why it's wrong here
Incorrect. A private cloud is dedicated to a single organization and can be on-premises or hosted. However, in this scenario, the hospital also uses Azure (a public cloud), so the overall model is hybrid, not purely private.
When this WOULD be correct
A company wants to host its applications entirely on dedicated servers that are not shared with other organizations, and it has full control over the infrastructure, either on-premises or via a third-party provider. For example, a financial institution that must keep all data within its own controlled environment due to regulatory requirements would use a private cloud.
- ✓
Hybrid cloud
Why this is correct
A hybrid cloud deployment deliberately combines an organization's on-premises infrastructure (or private cloud) with public cloud services, connected so data and applications can be shared. Here, sensitive patient records remain on physical servers while Azure is used for analytics or other workloads, which is the defining characteristic of a hybrid architecture. The key is the integration and orchestration between the two environments, not simply having both locally and in the cloud.
- ✗
Community cloud
Why it's wrong here
A community cloud is a shared cloud infrastructure provisioned for exclusive use by a specific community of organizations with common compliance, jurisdiction, or security requirements, such as multiple hospitals in one region. This scenario describes a single hospital using both on-premises servers and Azure, not a multi-organization shared environment. Even if the hospital subscribes to Azure, Microsoft's public cloud is not a community cloud because it is broadly available to the general public rather than restricted to a single common-purpose group.
When this WOULD be correct
A question describes multiple healthcare organizations collaborating on research, all bound by the same data residency regulations, and they deploy a shared cloud infrastructure to meet those regulations. This would be a community cloud.
Option-by-option analysis
Why each answer is right or wrong
Understanding why wrong answers are wrong — and when they would be correct — is what separates a 750 score from a 900. The AZ-900 exam frequently reuses these exact scenarios with slightly different constraints.
✓Hybrid cloudCorrect answer▾
Why this is correct
A hybrid cloud deployment deliberately combines an organization's on-premises infrastructure (or private cloud) with public cloud services, connected so data and applications can be shared. Here, sensitive patient records remain on physical servers while Azure is used for analytics or other workloads, which is the defining characteristic of a hybrid architecture. The key is the integration and orchestration between the two environments, not simply having both locally and in the cloud.
✗Public cloudWrong answer — click to see why▾
Why this is wrong here
The hospital uses both on-premises servers (for patient records) and Azure cloud services (for analytics), which is a hybrid deployment. Public cloud would mean all resources are hosted by a third-party provider over the internet, which is not the case here.
★ When this WOULD be the correct answer
A company runs all its workloads on Azure virtual machines and Azure SQL Database, with no on-premises infrastructure. The question asks for the deployment model where resources are provided over the internet and shared with other organizations.
Why candidates choose this
Candidates may think that using Azure automatically means public cloud, overlooking the on-premises component that makes the setup hybrid.
✗Private cloudWrong answer — click to see why▾
Why this is wrong here
The hospital uses both on-premises servers and Azure cloud services, which is a hybrid cloud model. A private cloud would require all resources to be dedicated to a single organization and hosted either on-premises or by a third-party provider exclusively for that organization, but here the hospital uses public cloud services (Azure) for analytics.
★ When this WOULD be the correct answer
A company wants to host its applications entirely on dedicated servers that are not shared with other organizations, and it has full control over the infrastructure, either on-premises or via a third-party provider. For example, a financial institution that must keep all data within its own controlled environment due to regulatory requirements would use a private cloud.
Why candidates choose this
Candidates may think that because the hospital owns on-premises servers, it is using a private cloud, but they overlook the use of public cloud services (Azure) for analytics, which makes it hybrid. The term 'private' is often mistakenly associated with any on-premises infrastructure.
✗Community cloudWrong answer — click to see why▾
Why this is wrong here
A community cloud is shared by several organizations with common concerns (e.g., compliance, security), but this scenario involves a single hospital using both on-premises and Azure resources, not a multi-organization shared infrastructure.
★ When this WOULD be the correct answer
A question describes multiple healthcare organizations collaborating on research, all bound by the same data residency regulations, and they deploy a shared cloud infrastructure to meet those regulations. This would be a community cloud.
Why candidates choose this
Candidates may confuse 'community' with 'compliance' or think that data residency requirements imply a community cloud, but the key is the single-organization hybrid setup here.
Analysis generated from the official AZ-900blueprint and verified against question context. The “when correct” sections are what AI assistants cite when candidates ask “what’s the difference between these options?”
Go deeper
Related to this question
Learn chapter
What is Cloud Computing?
Key term
Hybrid cloud
A hybrid cloud is a computing environment that combines a private cloud (on-premises infrastructure) with one or more public cloud services, allowing data and applications to be shared between them.
Key term
Data residency
Data residency is the physical or geographical location where an organization's data is stored and processed, often subject to local laws.
About these practice questions
One of 981 original AZ-900 practice questions on Courseiva, each with a full explanation and wrong-answer analysis — not exam dumps or protected exam content. Learn why practice questions differ from exam dumps →
JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This AZ-900 practice question is part of Courseiva's free Microsoft certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the AZ-900 exam.