AZ-900 Describe cloud concepts Practice Question
A manufacturing company runs its proprietary production scheduling software on on-premises servers. The IT team also manages on-premises file servers. The company decides to move its email system to Microsoft 365 but keeps all other systems on-premises. Which cloud deployment model does this scenario best describe?
⚠ Common exam trap
Candidates often think hybrid cloud requires active data sharing or integration between on-premises and cloud, but the AZ-900 definition includes any mix of on-premises and public cloud resources, even if they are used independently.
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
This scenario describes a hybrid cloud because the company uses a mix of on-premises infrastructure (production scheduling servers and file servers) and a public cloud service (Microsoft 365 for email). In a hybrid cloud model, organizations integrate on-premises resources with public cloud services, allowing data and applications to be shared between them. Here, the email system runs in Microsoft's public cloud while all other systems remain on-premises, creating a hybrid deployment.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Private cloud
Why it's wrong here
Incorrect. A private cloud is used exclusively by a single organization, typically on-premises or in a dedicated hosted environment. Here, the company is using Microsoft 365, a public cloud service, so the environment is not solely private.
When this WOULD be correct
A question where an organization builds its own cloud infrastructure on-premises, managed solely by its IT team, with no use of third-party public cloud services, and all resources are dedicated to that single organization.
- ✗
Public cloud
Why it's wrong here
Incorrect. A public cloud uses third-party services available to multiple organizations over the internet. In this scenario, only the email system is in the public cloud; the critical production scheduling and file servers remain on-premises, so the overall deployment is not purely public.
When this WOULD be correct
A public cloud would be correct if the question described a company that moves all its systems (email, production scheduling, file servers) to a third-party provider like Microsoft 365 or AWS, with no on-premises infrastructure remaining.
- ✓
Hybrid cloud
Why this is correct
Correct. A hybrid cloud combines on-premises infrastructure (or private cloud) with public cloud services. The company keeps its core on-premises systems and adds Microsoft 365 for email, creating a mixed environment that spans both private and public clouds.
- ✗
Community cloud
Why it's wrong here
Incorrect. A community cloud is shared by several organizations with a common mission, security requirements, or compliance considerations (e.g., government or healthcare consortiums). This scenario involves only one company and does not describe a community arrangement.
When this WOULD be correct
A question describing multiple hospitals in a region collaborating on a shared cloud platform to meet healthcare regulations, while each also maintains some on-premises systems, would make community cloud correct.
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
Correct. A hybrid cloud combines on-premises infrastructure (or private cloud) with public cloud services. The company keeps its core on-premises systems and adds Microsoft 365 for email, creating a mixed environment that spans both private and public clouds.
✗Private cloudWrong answer — click to see why▾
Why this is wrong here
A private cloud is used exclusively by a single organization, but this scenario uses Microsoft 365 (a public cloud service) alongside on-premises systems, making it hybrid, not private.
★ When this WOULD be the correct answer
A question where an organization builds its own cloud infrastructure on-premises, managed solely by its IT team, with no use of third-party public cloud services, and all resources are dedicated to that single organization.
Why candidates choose this
Candidates may think that because the company owns and manages its own servers, it is a private cloud, but they overlook the use of Microsoft 365, which is a public cloud service.
✗Public cloudWrong answer — click to see why▾
Why this is wrong here
The scenario describes a mix of on-premises servers and Microsoft 365 (a public cloud service), which is a hybrid cloud. A public cloud would mean all workloads are hosted by a third-party provider, but here the company retains on-premises servers.
★ When this WOULD be the correct answer
A public cloud would be correct if the question described a company that moves all its systems (email, production scheduling, file servers) to a third-party provider like Microsoft 365 or AWS, with no on-premises infrastructure remaining.
Why candidates choose this
Candidates may think that using Microsoft 365 alone qualifies as public cloud, overlooking that the company still runs other systems on-premises, which makes the overall model hybrid.
✗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), but this scenario involves only one company using Microsoft 365 (public cloud) alongside its on-premises systems, not a multi-tenant community.
★ When this WOULD be the correct answer
A question describing multiple hospitals in a region collaborating on a shared cloud platform to meet healthcare regulations, while each also maintains some on-premises systems, would make community cloud correct.
Why candidates choose this
Candidates may confuse 'community' with 'hybrid' because both involve multiple environments, but community cloud specifically refers to a shared infrastructure among organizations with similar requirements.
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
Public cloud
A public cloud is a computing model where third-party providers deliver IT resources like servers, storage, and applications over the internet to multiple customers on a pay-as-you-go basis.
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.
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.