This MS-900 practice question tests your understanding of describe cloud concepts. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. 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.
During a Microsoft 365 planning workshop, host custom applications on virtual machines while managing the operating system. Cloud concept or benefit best matches this requirement?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "best"
Why it matters: Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
Platform as a Service (PaaS)
Why wrong: PaaS abstracts the operating system and runtime.
Infrastructure as a Service (IaaS)
IaaS provides virtual machines, storage, and networking while customers manage the operating system and applications.
Hybrid cloud
Why wrong: Hybrid cloud is a deployment model, not the service model described.
Software as a Service (SaaS)
Why wrong: SaaS is a finished application managed by the provider.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Infrastructure as a Service (IaaS)
Infrastructure as a Service (IaaS) provides virtualized computing resources over the internet, including virtual machines where you can host custom applications and have full control over the operating system. This matches the requirement because IaaS gives you the flexibility to manage the OS, install custom software, and configure the environment without worrying about the underlying physical hardware.
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.
Platform as a Service (PaaS)
Why it's wrong here
PaaS abstracts the operating system and runtime.
Infrastructure as a Service (IaaS)
Why this is correct
IaaS provides virtual machines, storage, and networking while customers manage the operating system and applications.
Clue confirmation
The clue word "best" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
Hybrid cloud
Why it's wrong here
Hybrid cloud is a deployment model, not the service model described.
Software as a Service (SaaS)
Why it's wrong here
SaaS is a finished application managed by the provider.
Common exam traps
The trap here is that candidates often confuse PaaS with IaaS because both involve hosting applications, but PaaS does not allow OS-level management, which is the key differentiator in this question.
Detailed technical explanation
In IaaS, the cloud provider manages the physical hardware, hypervisor, and network, while you retain control over the guest OS, storage, and deployed applications. For example, with Azure Virtual Machines, you can choose a Windows Server or Linux image, apply custom security patches, and configure the OS firewall using tools like RDP or SSH. This model is ideal for lift-and-shift migrations where existing on-premises applications need to run in the cloud with minimal changes.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
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.
What to study next
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Describe cloud concepts — study guide chapter
Learn the concepts, then practise the questions
Describe cloud concepts practice questions
Targeted practice on this topic area only
All MS-900 questions
985 questions across all exam domains
Microsoft 365 Fundamentals MS-900 study guide
Full concept coverage aligned to exam objectives
MS-900 practice test guide
How to use practice tests most effectively before exam day
Related practice questions
Use these pages to review the topic behind this question. This is how one missed question becomes focused revision.
Practise MS-900 questions linked to Describe Microsoft 365 apps and services.
Practise MS-900 questions linked to Describe Microsoft 365 pricing, licensing, and support.
Practise MS-900 questions linked to Describe cloud concepts.
Practise MS-900 questions linked to Describe security, compliance, privacy, and trust in Microsoft 365.
Practise MS-900 questions linked to Describe Microsoft 365 pricing and support.
Practise MS-900 questions linked to MS-900 fundamentals.
Practise MS-900 questions linked to MS-900 scenario.
Practise MS-900 questions linked to MS-900 troubleshooting.
Practice this exam
Short sessions build daily habit. Longer sessions build exam-day stamina. Try a timed session to simulate real conditions.
FAQ
Describe cloud concepts — This question tests Describe cloud concepts — Read the scenario before looking for a memorised answer..
The correct answer is: Infrastructure as a Service (IaaS) — Infrastructure as a Service (IaaS) provides virtualized computing resources over the internet, including virtual machines where you can host custom applications and have full control over the operating system. This matches the requirement because IaaS gives you the flexibility to manage the OS, install custom software, and configure the environment without worrying about the underlying physical hardware.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Yes — watch for: "best". Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
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 →
Last reviewed: Jun 11, 2026
This MS-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 MS-900 exam.
Question Discussion
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
Sign in to join the discussion.