- A
Apply a security update using Azure Update Manager.
Why wrong: Updates do not contain ongoing fileless attacks.
- B
Run a script via Azure Arc to disable the network interfaces on the server.
Disabling network interfaces isolates the server from the network, containing the threat.
- C
Use Azure Automation runbook to restart the server.
Why wrong: Restarting may not stop fileless malware; it may persist.
- D
Uninstall the Azure Arc agent from the server to isolate it.
Why wrong: Uninstalling the agent loses management and visibility.
Question 315 of 1,639
SC-200 Respond to security incidents Practice Question
This SC-200 practice question tests your understanding of respond to security incidents. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. 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.
Your organization uses Microsoft Defender for Cloud to monitor hybrid workloads. You receive an alert that a fileless malware attack was detected on an on-premises server connected via Azure Arc. The server is running Windows Server 2019. What is the BEST action to contain the threat?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue:
"best"Why it matters: Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
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
✓
Run a script via Azure Arc to disable the network interfaces on the server.
Option B is correct because disabling the network interfaces via Azure Arc immediately cuts off the compromised server's network connectivity, preventing lateral movement or data exfiltration by the fileless malware. Since fileless malware operates in memory and may not leave persistent artifacts, containment via network isolation is the fastest and most effective initial response.
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.
- ✗
Apply a security update using Azure Update Manager.
Why it's wrong here
Updates do not contain ongoing fileless attacks.
- ✓
Run a script via Azure Arc to disable the network interfaces on the server.
Why this is correct
Disabling network interfaces isolates the server from the network, containing the threat.
Clue confirmation
The clue word "best" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
Use Azure Automation runbook to restart the server.
Why it's wrong here
Restarting may not stop fileless malware; it may persist.
- ✗
Uninstall the Azure Arc agent from the server to isolate it.
Why it's wrong here
Uninstalling the agent loses management and visibility.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates confuse 'containment' with 'remediation' and choose a long-term fix like patching or restarting, rather than the immediate network isolation required to stop an active fileless attack.
Detailed technical explanation
How to think about this question
Fileless malware often exploits living-off-the-land binaries (LOLBins) like PowerShell or WMI to execute in memory without writing to disk. Disabling network interfaces at the OS level (e.g., via `Disable-NetAdapter` PowerShell cmdlet) stops all inbound and outbound traffic, including C2 channels, while preserving the server's state for forensic analysis. Azure Arc's hybrid connectivity allows you to run this script remotely even if the server's local admin access is compromised.
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 healthcare organisation deploys an application with a public-facing web tier and a private database tier. The database subnet has no public IP and only accepts connections from the web tier's security group. Questions like this test whether you can design cloud network isolation using VNets/VPCs, subnets, and security group rules.
What to study next
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
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Respond to security incidents — study guide chapter
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Respond to security incidents practice questions
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FAQ
Questions learners often ask
What does this SC-200 question test?
Respond to security incidents — This question tests Respond to security incidents — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Run a script via Azure Arc to disable the network interfaces on the server. — Option B is correct because disabling the network interfaces via Azure Arc immediately cuts off the compromised server's network connectivity, preventing lateral movement or data exfiltration by the fileless malware. Since fileless malware operates in memory and may not leave persistent artifacts, containment via network isolation is the fastest and most effective initial response.
What should I do if I get this SC-200 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Are there clue words in this question I should notice?
Yes — watch for: "best". Signals that multiple options may be partially correct. Choose the option that most directly solves the exact problem described, not the one that sounds most complete.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
About these practice questions
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Last reviewed: Jul 4, 2026
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.
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