The correct answer is hybrid cloud. This deployment model is the right choice because it specifically combines on-premises infrastructure, acting as a private cloud, with public cloud services like Azure to handle variable workloads—such as bursting during peak demand. By using technologies like Azure ExpressRoute or VPN gateways, the hybrid model creates a seamless, secure network that lets organizations scale capacity on-demand without permanently migrating all resources. On the Microsoft Azure Fundamentals AZ-900 exam, this concept tests your understanding of how different deployment models solve real-world business needs; a common trap is confusing hybrid with public cloud, where everything lives off-site, or private cloud, which lacks external scalability. Remember the memory tip: “Hybrid = Home + Hotel,” meaning you keep your own data center (home) but rent extra space (hotel) when you have too many guests.
AZ-900 Describe cloud concepts Practice Question
This AZ-900 practice question tests your understanding of describe cloud concepts. 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.
An organization wants to combine on-premises data center resources with Azure public cloud services to extend capacity during peak demand. Which cloud deployment model describes this approach?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Hybrid
The hybrid cloud model combines on-premises infrastructure (private cloud) with public cloud services, enabling workload bursting during peak demand. This approach uses technologies like Azure ExpressRoute or VPN gateways to create a seamless network, allowing organizations to scale capacity on-demand without permanently migrating all resources.
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.
✗
Public
Why it's wrong here
Public cloud is fully hosted by a third-party provider and does not include on-premises resources.
✗
Private
Why it's wrong here
Private cloud is dedicated to a single organization but does not utilize public cloud resources.
✓
Hybrid
Why this is correct
Hybrid cloud combines private and public clouds, allowing data and applications to be shared between them.
Related concept
Read the scenario before looking for a memorised answer.
✗
Multi-cloud
Why it's wrong here
Multi-cloud uses multiple public cloud providers, not a mix of on-premises and public.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Microsoft often tests the distinction between hybrid and multi-cloud, where candidates mistakenly choose multi-cloud because they think using any external cloud constitutes a hybrid model, but hybrid specifically requires an on-premises component.
Detailed technical explanation
How to think about this question
Hybrid cloud relies on site-to-site VPN or Azure ExpressRoute (using BGP for dynamic routing) to connect on-premises networks to Azure VNets, enabling resource bursting via Azure Scale Sets or Azure Kubernetes Service. A subtle behavior is that hybrid networking requires careful IP address space planning to avoid overlap, and ExpressRoute provides a dedicated private connection with SLA-backed throughput, unlike VPNs which traverse the internet.
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
An e-commerce site experiences heavy traffic on Black Friday and near-zero traffic during off-peak weeks. Rather than provisioning permanent large VMs, the team uses auto-scaling groups that add capacity automatically under load and reduce it overnight. Questions like this test whether you understand elasticity, availability zones, and cloud compute scaling patterns.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this AZ-900 question in full detail.
Describe cloud concepts — This question tests Describe cloud concepts — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Hybrid — The hybrid cloud model combines on-premises infrastructure (private cloud) with public cloud services, enabling workload bursting during peak demand. This approach uses technologies like Azure ExpressRoute or VPN gateways to create a seamless network, allowing organizations to scale capacity on-demand without permanently migrating all resources.
What should I do if I get this AZ-900 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.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.
Variation 1. A financial services company has an on-premises data center that houses sensitive customer data. Regulatory requirements mandate that this data cannot be stored or processed outside the company's physical premises. However, the company wants to take advantage of cloud computing for compute-intensive risk analysis workloads that process anonymized subsets of the data. The company also needs to maintain a consistent management and security posture across both environments. Which cloud deployment model should the company adopt?
medium
A.Public cloud
B.Private cloud
✓ C.Hybrid cloud
D.Community cloud
Why C: Hybrid cloud (C) is correct because it allows the company to keep sensitive customer data on-premises to meet regulatory requirements while leveraging the public cloud for compute-intensive risk analysis on anonymized subsets. This model also enables consistent management and security policies across both environments through unified tools like Azure Arc or AWS Outposts.
Variation 2. A company runs its production workloads on an on-premises data center to meet strict regulatory compliance requirements. However, the development and testing teams use Azure to quickly provision environments on demand for short-term projects. The teams need to occasionally transfer data between the on-premises environment and Azure. Which cloud deployment model does this setup represent?
medium
A.Public cloud
B.Private cloud
✓ C.Hybrid cloud
D.Community cloud
Why C: This setup combines an on-premises data center (private cloud) with Azure (public cloud) to form a hybrid cloud. The hybrid cloud model allows workloads to remain on-premises for compliance while leveraging Azure's elasticity for dev/test, with data transfer bridging both environments.
Last reviewed: Jun 30, 2026
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