SC-100 Quick Quiz — 10 Questions

Question 1

Refer to the exhibit. A KQL query is used in Microsoft Sentinel to detect brute-force attacks. The query returns no results despite known brute-force attempts. What is the most likely issue?

Accepted Answer

The EventID 4625 may not cover all authentication failures. EventID 4625 in Windows Security logs specifically records failed logon attempts, but brute-force attacks may target other authentication protocols (e.g., RDP, SMB, or network-level authentication) that generate different EventIDs (such as 4648, 4776, or 5156). Additionally, some brute-force attempts might be blocked at the network layer or use non-Windows authentication methods, so relying solely on EventID 4625 will miss those events. Therefore, the query returns no results because it does not capture all authentication failure scenarios.

Answer

The query lacks a time filter

Answer

The 'IPAddress' field does not exist in SecurityEvent

Answer

The 'count()' aggregation is incorrect

Question 2

A startup, Alpine Ski House, is developing a mobile app that allows users to book ski lessons. The app communicates with an Azure Function App backend via REST APIs. The function app stores data in Azure Cosmos DB. The company wants to secure the API endpoints using OAuth 2.0 with Microsoft Entra ID and ensure that only authenticated users can invoke the functions. The function app should also use a managed identity to access Cosmos DB. Which of the following configurations should you implement?

Accepted Answer

Configure the function app to require authentication with Microsoft Entra ID, enforce HTTPS only, and use a system-assigned managed identity to access Cosmos DB.. It uses OAuth 2.0 with Entra ID for authentication, managed identity for database access, and enforces HTTPS. Option B is wrong because function keys are not secure for user authentication. Option C is wrong because client certificates do not provide user-level authentication. Option D is wrong because IP whitelisting is not a substitute for authentication.

Answer

Configure the function app to use function-level authorization keys, enforce HTTPS only, and use a connection string with a read-write key to access Cosmos DB.

Answer

Configure the function app to require client certificates, enforce HTTPS only, and use a managed identity to access Cosmos DB.

Answer

Configure the function app to use IP whitelisting, enforce HTTPS only, and use a managed identity to access Cosmos DB.

Question 3

A company needs to design a secure DevOps pipeline using GitHub Actions and Microsoft Defender for Cloud. They want to scan infrastructure-as-code (IaC) templates for misconfigurations before deployment. What should they integrate?

Accepted Answer

Microsoft Defender for Cloud Infrastructure as Code scanning. Microsoft Defender for Cloud includes a native Infrastructure as Code (IaC) scanning capability that integrates directly with GitHub Actions. This feature automatically analyzes IaC templates (such as ARM, Bicep, Terraform, and CloudFormation) for security misconfigurations during the CI/CD pipeline, providing pre-deployment guardrails. By failing the pipeline on critical findings, it ensures only compliant infrastructure is deployed, aligning with the secure DevOps principle of shifting security left.

Answer

Microsoft Purview Compliance Manager

Answer

Microsoft Sentinel

Answer

Microsoft Defender for Cloud Apps

Question 4

Your organization is migrating to Microsoft 365 and wants to implement a data classification strategy. The compliance team needs to automatically detect and label documents containing personal data (e.g., Social Security numbers) in SharePoint Online. Which Microsoft Purview solution should you use?

Accepted Answer

Auto-labeling policies. Auto-labeling policies in Microsoft Purview are designed to automatically detect sensitive data types (e.g., Social Security numbers) using built-in or custom sensitive information types and apply sensitivity labels to documents in SharePoint Online. This meets the requirement for automatic detection and labeling without user intervention, as the compliance team needs.

Answer

Records Management

Answer

eDiscovery

Answer

Data Loss Prevention policies

Question 5

Your company is migrating to a cloud-native security operations center (SOC) using Microsoft Sentinel. You need to design a solution that automatically investigates and remediates common incidents like brute-force attacks on Azure VMs. The solution should use playbooks triggered by analytics rules. Which Microsoft service should you use to create the playbooks, and what is the recommended authentication method?

Accepted Answer

Azure Logic Apps with managed identity. Azure Logic Apps is the recommended platform for Sentinel playbooks. Managed identity is the preferred authentication method because it avoids credential management and supports automation. Azure Automation is for runbooks, not playbooks. Service principal is possible but not recommended due to credential management.

Answer

Power Automate with user account

Answer

Azure Automation with service principal

Answer

Azure Functions with API key

Question 6

Your organization is planning to deploy Microsoft Purview Information Protection to classify and protect sensitive data. You need to design a solution that automatically applies sensitivity labels to documents containing personally identifiable information (PII) when they are uploaded to SharePoint Online. Which configuration should you use?

Accepted Answer

Create an auto-labeling policy that uses a sensitive info type for PII. Microsoft Purview auto-labeling policies can automatically apply sensitivity labels to documents containing PII when they are uploaded to SharePoint Online. By configuring a policy with a sensitive info type (e.g., U.S. Social Security Number) as the condition, the service scans content at rest and applies the label without user intervention, meeting the requirement for automatic classification.

Answer

Set a default sensitivity label for the SharePoint site

Answer

Use trainable classifiers to identify PII and apply labels

Answer

Configure a manual labeling policy that prompts users to classify documents

Question 7

Your company is migrating on-premises Active Directory to Microsoft Entra ID. The security team requires that users must use passwordless authentication methods for all sign-ins. Which Microsoft Entra ID feature should you enable to support passwordless authentication?

Accepted Answer

Microsoft Entra ID passwordless authentication methods. Microsoft Entra ID passwordless authentication methods (such as Windows Hello for Business, FIDO2 security keys, and Microsoft Authenticator) are the native features designed to eliminate passwords entirely. These methods satisfy the security team's requirement by enabling users to sign in without a password, using biometrics or cryptographic keys instead.

Answer

Password hash synchronization

Answer

Seamless Single Sign-On (Seamless SSO)

Answer

Pass-through authentication

Question 8

A company is designing a data security strategy using Microsoft Purview. They need to identify sensitive data across their data estate, including on-premises SQL Server, Azure SQL Database, and Amazon S3. Which THREE components should they use? (Choose three.)

Accepted Answer

Microsoft Purview Data Estate Insights. Microsoft Purview Data Estate Insights provides visibility into data estate health and security posture, including sensitive data discovery across on-premises SQL Server, Azure SQL Database, and Amazon S3. It aggregates scan results and offers dashboards to identify where sensitive data resides, enabling targeted classification and protection actions.

Answer

Microsoft Purview External Identities

Answer

Microsoft Purview Compliance Manager

Question 9

Your organization uses Microsoft Sentinel and wants to automatically respond to high-severity incidents. Which feature should you configure?

Accepted Answer

Configure an automation rule to run a playbook automatically. Automation rules in Microsoft Sentinel allow you to define automated responses that trigger when an incident is created or updated, including running playbooks (Azure Logic Apps workflows) automatically. This is the correct approach for automatically responding to high-severity incidents because it eliminates manual intervention and ensures consistent, immediate action based on incident properties like severity.

Answer

Create a playbook and run it manually for each incident

Answer

Set up an analytics rule with automatic response

Answer

Use a workbook to trigger a playbook

Question 10

Your company uses Microsoft Defender for Cloud Apps and wants to prevent users from uploading sensitive files to personal cloud storage apps. What should you configure?

Accepted Answer

Session policy. Session policy in Microsoft Defender for Cloud Apps allows real-time monitoring and control of user activities based on app and content inspection. By configuring a session policy, you can block or restrict uploads of sensitive files to personal cloud storage apps like Dropbox or Google Drive during the user's session, leveraging reverse proxy capabilities to inspect and intervene in traffic.

Answer

Activity policy

Answer

App connector

Answer

File policy