SC-200 Respond to security incidents Practice Question
Which TWO actions should a security analyst take when responding to a confirmed malware outbreak in Microsoft Defender for Endpoint?
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
✓
Isolate the affected device
Options A and B are correct. Option A: Isolating the affected device immediately contains the outbreak and prevents lateral movement to other endpoints. Option B: Running a full scan ensures all malware components and artifacts are identified and removed. Option C is wrong because creating a custom detection rule is a proactive measure for future detections, not an immediate response to a confirmed outbreak. Option D is wrong because deleting the user account is extreme and does not address the malware on the device. Option E is wrong because resetting the user's password helps with credential compromise but does not stop active malware.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Isolate the affected device
Why this is correct
Isolation stops the malware from spreading.
- ✓
Run a full scan on the device
Why this is correct
Full scan detects and helps remove malware.
- ✗
Create a custom detection rule for the malware
Why it's wrong here
This is for future detection, not immediate response.
- ✗
Delete the user account
Why it's wrong here
Deleting the account is excessive and not part of standard response.
- ✗
Reset the user's password
Why it's wrong here
Password reset does not stop malware already running.
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Same concept, more angles
3 more ways this is tested on SC-200
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Variation 1. Which TWO actions should a security analyst take to contain a ransomware outbreak on a Windows server that has Microsoft Defender for Endpoint installed?
medium- ✓ A.Run a full scan with Microsoft Defender Antivirus
- B.Reset the local administrator password
- ✓ C.Initiate device isolation
- D.Uninstall Microsoft Defender for Endpoint and reinstall
- E.Restore the system from a backup
Why A: Options B and D are correct. B isolates the device to prevent lateral movement, and D runs a scan to remove the ransomware. Option A is wrong because resetting the password does not stop the ransomware. Option C is wrong because uninstalling would remove protection. Option E is wrong because a full restore might reintroduce the malware.
Variation 2. Which TWO response actions are available in Microsoft Defender for Endpoint for a compromised device? (Choose two.)
easy- A.Disable the user account
- ✓ B.Run a full antivirus scan
- C.Change the Windows Firewall rules
- ✓ D.Isolate the device from the network
- E.Reset the device to factory defaults
Why B: Options B and D are correct because Microsoft Defender for Endpoint includes predefined response actions such as running a full antivirus scan and isolating a device from the network. Option A is incorrect because disabling the user account is an identity mitigation action in Azure AD, not a device response in Defender for Endpoint. Option C is incorrect because changing Windows Firewall rules is not a standard response action in Defender for Endpoint. Option E is incorrect because resetting a device to factory defaults is not a supported response action.
Variation 3. Which TWO remediation actions are available in Microsoft Defender for Endpoint when responding to a malware infection?
hard- ✓ A.Run a full antivirus scan
- B.Disable the user account
- C.Reset the device to factory settings
- D.Block the application in Defender for Cloud Apps
- ✓ E.Isolate the device from the network
Why A: Microsoft Defender for Endpoint allows running a full antivirus scan as a remediation action for malware infections. Option E is correct because isolating the device from the network is a built-in remediation action to contain the threat and prevent lateral movement. Option B is incorrect because disabling the user account is an identity-related action typically performed in Microsoft Entra ID, not within MDE's remediation capabilities. Option C is incorrect because resetting to factory settings is not a standard remediation action in MDE; it would be a post-remediation step. Option D is incorrect because blocking the application in Defender for Cloud Apps is a cloud app security control, not a remediation action within Endpoint.
JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This SC-200 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-200 exam.