The most efficient way to achieve automatic device isolation on incident creation is to create an automation rule in Microsoft Sentinel that triggers a playbook, which uses the Microsoft Defender for Endpoint connector to isolate the device. This works because automation rules in Sentinel can respond to incident creation events by executing a playbook—a collection of automated workflows built in Azure Logic Apps—and the Defender for Endpoint connector provides a direct action to isolate a device, making the entire process seamless without manual intervention. On the SC-200 exam, this scenario tests your understanding of how Sentinel automation rules bridge incident detection and response actions, often appearing as a trap where candidates confuse automation rules with custom detection rules or manual steps. A common mistake is thinking automation rules can run scripts directly, but they only trigger playbooks. Remember the memory tip: “Rule triggers playbook, playbook isolates device”—if you see “script” or “manual” in an option, eliminate it immediately.
SC-200 Respond to security incidents Practice Question
This SC-200 practice question tests your understanding of respond to security incidents. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. 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 Sentinel and Microsoft Defender XDR. You want to automatically isolate a device when a high-severity incident is created. What is the most efficient way to achieve this?
Manually isolate the device from the Microsoft Defender for Endpoint console after the incident is created.
Why wrong: Manual action is not automatic.
B
Create an automation rule in Microsoft Sentinel that runs a PowerShell script to isolate the device.
Why wrong: Automation rules run playbooks, not scripts directly.
C
Create a custom detection rule in Microsoft Defender XDR that triggers device isolation.
Why wrong: This would isolate before Sentinel incident creation.
D
Create an automation rule in Microsoft Sentinel that triggers a playbook, which uses the Microsoft Defender for Endpoint connector to isolate the device.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Create an automation rule in Microsoft Sentinel that triggers a playbook, which uses the Microsoft Defender for Endpoint connector to isolate the device.
Option C is correct because Microsoft Sentinel automation rules can run a playbook that isolates the device via Microsoft Defender for Endpoint. Option A is wrong because automation rules cannot directly run scripts. Option B is wrong because creating a custom detection rule in Defender does not integrate with Sentinel incident creation. Option D is wrong because manual isolation is not automatic.
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.
✗
Manually isolate the device from the Microsoft Defender for Endpoint console after the incident is created.
Why it's wrong here
Manual action is not automatic.
✗
Create an automation rule in Microsoft Sentinel that runs a PowerShell script to isolate the device.
Why it's wrong here
Automation rules run playbooks, not scripts directly.
✗
Create a custom detection rule in Microsoft Defender XDR that triggers device isolation.
Why it's wrong here
This would isolate before Sentinel incident creation.
✓
Create an automation rule in Microsoft Sentinel that triggers a playbook, which uses the Microsoft Defender for Endpoint connector to isolate the device.
Why this is correct
This is the most efficient integrated approach.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Detailed technical explanation
How to think about this question
This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.
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.
Use explanations to understand the rule behind the answer.
TExam Day Tips
→Underline the problem statement mentally.
→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 cloud solutions architect for a retail company is evaluating services for a new workload. The correct answer here reflects best practice for the specific scenario described — not a general cloud recommendation. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Cloud exam questions reward reading the constraint carefully: the same technology can be right or wrong depending on the use case.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this SC-200 question in full detail.
Identify which SC-200 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
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: Create an automation rule in Microsoft Sentinel that triggers a playbook, which uses the Microsoft Defender for Endpoint connector to isolate the device. — Option C is correct because Microsoft Sentinel automation rules can run a playbook that isolates the device via Microsoft Defender for Endpoint. Option A is wrong because automation rules cannot directly run scripts. Option B is wrong because creating a custom detection rule in Defender does not integrate with Sentinel incident creation. Option D is wrong because manual isolation is not automatic.
What should I do if I get this SC-200 question wrong?
Identify which SC-200 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Question Discussion
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