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 large enterprise uses a variety of cloud applications, including sanctioned apps like Microsoft 365 and unsanctioned apps that employees adopted without IT approval. The security team wants to discover all cloud applications in use, assess each app's risk score based on more than 80 risk factors, and control data sharing within sanctioned apps to prevent data leakage. Additionally, they need to identify which users are using a new, unknown file-sharing service. Which Microsoft security solution should be deployed to meet these requirements?
Why wrong: Defender for Cloud is for securing cloud workloads (VMs, databases) with posture management and threat detection; it does not discover or assess cloud apps.
B
Microsoft Defender for Cloud Apps
Defender for Cloud Apps is a CASB that discovers all cloud apps, assesses their risk using 80+ factors, and allows control over sanctioned apps.
C
Microsoft Defender for Endpoint
Why wrong: Defender for Endpoint protects devices from malware and attacks; it does not discover cloud apps.
D
Microsoft Purview Data Loss Prevention (DLP)
Why wrong: DLP can prevent data leakage but does not discover shadow IT or assess risk of cloud apps.
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 Cloud Apps
Microsoft Defender for Cloud Apps (formerly Microsoft Cloud App Security) is a Cloud Access Security Broker (CASB) that provides visibility into both sanctioned and unsanctioned cloud apps through its Cloud Discovery feature. It assesses risk scores based on over 80 risk factors (e.g., encryption standards, data residency, and compliance certifications) and enables data sharing controls via session policies (e.g., Conditional Access App Control) to prevent data leakage. It also supports anomaly detection to identify users of new, unknown file-sharing services by analyzing traffic logs from network appliances or endpoints.
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
Defender for Cloud is for securing cloud workloads (VMs, databases) with posture management and threat detection; it does not discover or assess cloud apps.
✓
Microsoft Defender for Cloud Apps
Why this is correct
Defender for Cloud Apps is a CASB that discovers all cloud apps, assesses their risk using 80+ factors, and allows control over sanctioned apps.
Related concept
Read the scenario before looking for a memorised answer.
✗
Microsoft Defender for Endpoint
Why it's wrong here
Defender for Endpoint protects devices from malware and attacks; it does not discover cloud apps.
✗
Microsoft Purview Data Loss Prevention (DLP)
Why it's wrong here
DLP can prevent data leakage but does not discover shadow IT or assess risk of cloud 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 tool for Azure) with Microsoft Defender for Cloud Apps (a CASB), or they assume that Purview DLP alone can discover and risk-assess unsanctioned apps, when in fact DLP only controls data after the app is already identified and integrated.
Detailed technical explanation
How to think about this question
Under the hood, Defender for Cloud Apps uses Cloud Discovery by integrating with network appliances (e.g., Zscaler, Palo Alto) via log uploads or deploying the Microsoft Defender for Cloud Apps log collector to parse traffic logs (e.g., Common Event Format, RFC 5424). It then applies a proprietary risk scoring algorithm that evaluates factors like SOC 2 certification, PCI DSS compliance, and data-at-rest encryption (AES-256). For controlling data sharing, it uses Conditional Access App Control to enforce real-time session policies (e.g., block download, restrict copy/paste) by proxying traffic through reverse proxy architecture, which works with any SAML or OAuth-enabled app.
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.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this SC-900 question in full detail.
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 Defender for Cloud Apps — Microsoft Defender for Cloud Apps (formerly Microsoft Cloud App Security) is a Cloud Access Security Broker (CASB) that provides visibility into both sanctioned and unsanctioned cloud apps through its Cloud Discovery feature. It assesses risk scores based on over 80 risk factors (e.g., encryption standards, data residency, and compliance certifications) and enables data sharing controls via session policies (e.g., Conditional Access App Control) to prevent data leakage. It also supports anomaly detection to identify users of new, unknown file-sharing services by analyzing traffic logs from network appliances or endpoints.
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.
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