- A
Microsoft Defender for Cloud
Why wrong: Microsoft Defender for Cloud is a cloud security posture management (CSPM) and cloud workload protection platform (CWPP) for Azure, on-premises, and other clouds. It does not provide the unified XDR across Microsoft 365 services.
- B
Microsoft 365 Defender
Correct. Microsoft 365 Defender is an extended detection and response (XDR) solution that provides coordinated protection across the Microsoft 365 ecosystem, including email, endpoints, identities, and cloud apps.
- C
Microsoft Sentinel
Why wrong: Microsoft Sentinel is a cloud-native security information and event management (SIEM) and security orchestration automated response (SOAR) solution. It aggregates security data from many sources but is not specifically designed as a unified XDR for Microsoft 365.
- D
Microsoft Entra ID Protection
Why wrong: Microsoft Entra ID Protection detects identity-based risks such as leaked credentials and unusual sign-ins. It does not provide cross-domain threat protection for email, endpoints, and apps.
SC-900 Practice Question: Describe the capabilities of Microsoft security solutions
This SC-900 practice question tests your understanding of describe the capabilities of microsoft security solutions. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. 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 uses Microsoft 365 and Azure. They want a unified security solution that provides threat protection across email, endpoints, identities, and cloud apps, with automated investigation and response capabilities. Which Microsoft solution should they use?
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
Microsoft 365 Defender
Microsoft 365 Defender is a unified pre- and post-breach enterprise defense suite that coordinates detection, prevention, investigation, and response across email, endpoints, identities, and cloud apps. It provides automated investigation and response (AIR) capabilities through its integrated components (e.g., Defender for Endpoint, Defender for Office 365, Defender for Identity, and Defender for Cloud Apps), making it the correct choice for the described requirements.
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.
- ✗
Microsoft Defender for Cloud
Why it's wrong here
Microsoft Defender for Cloud is a cloud security posture management (CSPM) and cloud workload protection platform (CWPP) for Azure, on-premises, and other clouds. It does not provide the unified XDR across Microsoft 365 services.
- ✓
Microsoft 365 Defender
Why this is correct
Correct. Microsoft 365 Defender is an extended detection and response (XDR) solution that provides coordinated protection across the Microsoft 365 ecosystem, including email, endpoints, identities, and cloud apps.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Microsoft Sentinel
Why it's wrong here
Microsoft Sentinel is a cloud-native security information and event management (SIEM) and security orchestration automated response (SOAR) solution. It aggregates security data from many sources but is not specifically designed as a unified XDR for Microsoft 365.
- ✗
Microsoft Entra ID Protection
Why it's wrong here
Microsoft Entra ID Protection detects identity-based risks such as leaked credentials and unusual sign-ins. It does not provide cross-domain threat protection for email, endpoints, and apps.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse Microsoft Defender for Cloud (a CSPM/CWPP tool for cloud workloads) with Microsoft 365 Defender (a unified XDR solution for the Microsoft 365 ecosystem), or they mistakenly think Microsoft Sentinel (a SIEM) provides the same built-in, cross-domain automated investigation and response as Microsoft 365 Defender.
Detailed technical explanation
How to think about this question
Microsoft 365 Defender uses a shared signals architecture where alerts from Defender for Endpoint, Defender for Office 365, Defender for Identity, and Defender for Cloud Apps are correlated into a single incident in the Microsoft 365 Defender portal. Its automated investigation and response (AIR) engine uses playbooks and machine learning to automatically contain threats (e.g., isolating a compromised device or quarantining a malicious email) without manual intervention, reducing mean time to respond (MTTR).
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
A company's IT admin needs to give a contractor read-only access to production logs without sharing account credentials. Using role-based access control (RBAC) and temporary scoped permissions — not a permanent shared password — is the correct pattern. Questions like this test whether you can apply least-privilege access across cloud identity services.
What to study next
Got this wrong? Here's your next step.
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FAQ
Questions learners often ask
What does this SC-900 question test?
Describe the capabilities of Microsoft security solutions — This question tests Describe the capabilities of Microsoft security solutions — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Microsoft 365 Defender — Microsoft 365 Defender is a unified pre- and post-breach enterprise defense suite that coordinates detection, prevention, investigation, and response across email, endpoints, identities, and cloud apps. It provides automated investigation and response (AIR) capabilities through its integrated components (e.g., Defender for Endpoint, Defender for Office 365, Defender for Identity, and Defender for Cloud Apps), making it the correct choice for the described requirements.
What should I do if I get this SC-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
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Last reviewed: Jun 11, 2026
This SC-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 SC-900 exam.
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