Quick Answer
The answer is Microsoft Sentinel integrated with Microsoft Defender XDR. This combination provides a central SIEM and XDR platform for a hybrid environment because Sentinel ingests and correlates security logs from across the entire digital estate—including on-premises servers, cloud workloads, and identities—while Defender XDR extends detection and response across endpoints, email, and identities, with Sentinel acting as the unified analytics and orchestration layer. On the Microsoft Cybersecurity Architect exam, this scenario tests your understanding of how SIEM and XDR complement each other rather than compete; a common trap is confusing Defender for Cloud (a CSPM tool) or Intune (device management) with SIEM capabilities. Remember the pairing: Sentinel is the “brain” for log aggregation and incident response, Defender XDR is the “muscle” for cross-domain threat detection. A useful memory tip is “Sentinel sees all, Defender defends all”—together they cover the full hybrid estate.
This SC-100 practice question tests your understanding of design security operations, identity, and compliance capabilities. 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 wants to monitor and respond to threats across their entire digital estate, including on-premises servers, cloud workloads, and identities. Which Microsoft solution should they use as a central security information and event management (SIEM) and extended detection and response (XDR) platform?
Microsoft Intune
Why wrong: Device management, not security monitoring.
Microsoft Defender for Cloud
Why wrong: Not a SIEM.
Microsoft Sentinel and Microsoft Defender XDR
Sentinel provides SIEM, Defender XDR provides XDR.
Microsoft Purview
Why wrong: Data governance, not SIEM.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Microsoft Sentinel and Microsoft Defender XDR
Option D is correct because Microsoft Sentinel is the SIEM and SOAR solution, while Microsoft Defender XDR provides XDR capabilities. The question asks for a central SIEM and XDR platform; Microsoft Sentinel integrates with Defender XDR. Option A is wrong because Microsoft Defender for Cloud is a cloud security posture management (CSPM) and cloud workload protection (CWP) tool, not a SIEM. Option B is wrong because Microsoft Intune is for device management. Option C is wrong because Microsoft Purview is for data governance and compliance.
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.
Microsoft Intune
Why it's wrong here
Device management, not security monitoring.
Microsoft Defender for Cloud
Why it's wrong here
Not a SIEM.
Microsoft Sentinel and Microsoft Defender XDR
Why this is correct
Sentinel provides SIEM, Defender XDR provides XDR.
Related concept
Read the scenario before looking for a memorised answer.
Microsoft Purview
Why it's wrong here
Data governance, not SIEM.
Common exam traps
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Detailed technical explanation
This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
A cloud solutions architect for a retail company is evaluating services for a new workload. The correct answer here reflects best practice for the specific scenario described — not a general cloud recommendation. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Cloud exam questions reward reading the constraint carefully: the same technology can be right or wrong depending on the use case.
What to study next
Identify which SC-100 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
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FAQ
Design security operations, identity, and compliance capabilities — This question tests Design security operations, identity, and compliance capabilities — Read the scenario before looking for a memorised answer..
The correct answer is: Microsoft Sentinel and Microsoft Defender XDR — Option D is correct because Microsoft Sentinel is the SIEM and SOAR solution, while Microsoft Defender XDR provides XDR capabilities. The question asks for a central SIEM and XDR platform; Microsoft Sentinel integrates with Defender XDR. Option A is wrong because Microsoft Defender for Cloud is a cloud security posture management (CSPM) and cloud workload protection (CWP) tool, not a SIEM. Option B is wrong because Microsoft Intune is for device management. Option C is wrong because Microsoft Purview is for data governance and compliance.
Identify which SC-100 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
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 →
Same concept, more angles
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. Your organization needs to monitor and respond to threats across email, endpoints, and identities. Which Microsoft solution provides a unified incident response experience?
easyWhy C: Microsoft Defender XDR (Extended Detection and Response) is the correct choice because it provides a unified incident response experience by correlating alerts and signals from email (Defender for Office 365), endpoints (Defender for Endpoint), and identities (Defender for Identity) into a single incident queue. This cross-domain correlation enables security teams to investigate and remediate complex multi-stage attacks from a single pane of glass, rather than switching between separate consoles.
Last reviewed: Jun 21, 2026
This SC-100 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-100 exam.
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