SC-900 Practice Question: Describe the capabilities of Microsoft security solutions
An organization wants to protect its fleet of Windows 10 laptops from advanced malware and ransomware. The solution must detect suspicious behavior (e.g., a process encrypting files) and provide security teams with the ability to isolate an infected device from the network for investigation. Which Microsoft security solution should they deploy?
⚠ Common exam trap
Candidates often confuse Microsoft Defender for Cloud (a cloud workload protection tool) with endpoint protection, or they assume Defender for Office 365 covers all devices, when in fact only Defender for Endpoint provides the specific behavioral detection and device isolation for Windows 10 laptops.
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 Defender for Endpoint
Microsoft Defender for Endpoint (MDE) is the correct solution because it provides endpoint detection and response (EDR) capabilities, including behavioral-based detection of advanced malware and ransomware (e.g., detecting a process encrypting files via machine learning and behavioral analytics). It also includes automated investigation and remediation features, such as the ability to isolate an infected device from the network (device isolation) to prevent lateral movement while allowing security teams to investigate.
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 incorrect as it is a cloud workload protection platform (CWPP) and cloud security posture management (CSPM) solution. Its purpose is to secure cloud and hybrid workloads, including virtual machines, containers, databases, and other Azure services, by providing security recommendations and threat detection for infrastructure. It does not offer direct endpoint protection for user-facing client devices such as Windows 10 laptops.
When this WOULD be correct
An organization wants to assess and improve the security posture of its Azure virtual machines and detect threats across hybrid cloud workloads. They need a solution that provides security recommendations and just-in-time VM access. In that scenario, Microsoft Defender for Cloud would be the correct answer.
- ✓
Microsoft Defender for Endpoint
Why this is correct
Microsoft Defender for Endpoint is the correct solution because it provides comprehensive, next-generation endpoint protection specifically designed for devices like Windows 10 laptops. It includes capabilities such as antivirus, behavioral analysis, endpoint detection and response (EDR) for advanced threat hunting, and automated investigation and remediation to protect against sophisticated malware and zero-day attacks. Furthermore, it offers vulnerability management and device isolation to contain threats effectively.
- ✗
Microsoft Defender for Cloud Apps
Why it's wrong here
Microsoft Defender for Cloud Apps is incorrect because it functions as a Cloud Access Security Broker (CASB), providing visibility, control, and threat protection for an organization's cloud applications and services. It helps discover shadow IT, monitor user activity within SaaS applications, enforce data loss prevention policies, and detect anomalous behavior in cloud app usage. This solution focuses on securing access to and data within cloud applications, not on protecting the underlying Windows 10 laptop operating system from malware.
When this WOULD be correct
An organization wants to gain visibility into shadow IT, control access to cloud apps, and protect data in SaaS applications like Office 365 or Salesforce. They need to detect anomalous behavior in cloud app usage and enforce policies such as blocking downloads from unmanaged devices.
- ✗
Microsoft Defender for Office 365
Why it's wrong here
Microsoft Defender for Office 365 is incorrect because its primary function is to protect an organization's email, SharePoint Online, OneDrive for Business, and Microsoft Teams from threats like phishing, spam, and malware embedded in collaboration content. While it scans files and links within these services, it does not provide direct operating system or device-level protection for the Windows 10 laptops themselves. It secures the data and communication channels within the Microsoft 365 cloud services, not the endpoint where those services are accessed.
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 SC-900 exam frequently reuses these exact scenarios with slightly different constraints.
✓Microsoft Defender for EndpointCorrect answer▾
Why this is correct
Microsoft Defender for Endpoint is the correct solution because it provides comprehensive, next-generation endpoint protection specifically designed for devices like Windows 10 laptops. It includes capabilities such as antivirus, behavioral analysis, endpoint detection and response (EDR) for advanced threat hunting, and automated investigation and remediation to protect against sophisticated malware and zero-day attacks. Furthermore, it offers vulnerability management and device isolation to contain threats effectively.
✗Microsoft Defender for CloudWrong answer — click to see why▾
Why this is 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 cloud resources. It does not provide endpoint detection and response (EDR) capabilities like behavior monitoring and device isolation for Windows 10 laptops.
★ When this WOULD be the correct answer
An organization wants to assess and improve the security posture of its Azure virtual machines and detect threats across hybrid cloud workloads. They need a solution that provides security recommendations and just-in-time VM access. In that scenario, Microsoft Defender for Cloud would be the correct answer.
Why candidates choose this
Candidates may confuse 'Defender for Cloud' with endpoint protection because the name includes 'Defender' and 'Cloud', assuming it covers all cloud-connected devices, including laptops. They may not realize it focuses on cloud infrastructure rather than endpoint devices.
✗Microsoft Defender for Cloud AppsWrong answer — click to see why▾
Why this is wrong here
Microsoft Defender for Cloud Apps is a cloud access security broker (CASB) that focuses on securing cloud applications and services, not on endpoint-level malware detection or device isolation for Windows 10 laptops.
★ When this WOULD be the correct answer
An organization wants to gain visibility into shadow IT, control access to cloud apps, and protect data in SaaS applications like Office 365 or Salesforce. They need to detect anomalous behavior in cloud app usage and enforce policies such as blocking downloads from unmanaged devices.
Why candidates choose this
Candidates may confuse 'cloud apps' with 'endpoint protection' or assume that any Microsoft Defender product provides comprehensive malware defense, overlooking the specific endpoint focus required for laptop protection and isolation.
Analysis generated from the official SC-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
Core Security Concepts
Key term
Lateral movement
Lateral movement is the technique attackers use to move through a network from one compromised system to another, seeking sensitive data or higher privileges.
Key term
Security
Security in IT is the practice of protecting systems, networks, and data from unauthorized access, damage, or theft.
About these practice questions
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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.