The answer is to initiate device isolation from the Microsoft Defender for Endpoint console and block indicators of compromise (IoCs). These two actions are correct because isolation immediately cuts off the compromised device from the network, preventing lateral movement of the ransomware, while blocking IoCs stops the execution of known malicious files or behaviors across the environment, effectively containing the threat at both the host and network layers. On the SC-200 exam, this question tests your ability to prioritize containment over remediation in a ransomware incident, a common scenario where candidates mistakenly choose to run a full antivirus scan or update policies first. A frequent trap is selecting "initiate automated investigation" as an immediate step, but that is a response action, not a containment step. Remember the memory tip: "Isolate and Block, then investigate the clock"—meaning containment (isolation and IoC blocking) must come before any automated investigation or remediation.
SC-200 Respond to security incidents Practice Question
This SC-200 practice question tests your understanding of respond to security incidents. 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.
Which TWO actions should you take when handling a confirmed ransomware incident in an environment protected by Microsoft Defender for Endpoint?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Block the ransomware file hash using threat intelligence indicators in Microsoft Defender.
Options A and C are correct. Option A isolates affected devices to prevent spread. Option C blocks indicators of compromise (IoCs) to stop further execution. Option B is not immediate; Option D is unnecessary if Defender manages updates; Option E is reactive and not a containment step.
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.
✓
Block the ransomware file hash using threat intelligence indicators in Microsoft Defender.
Why this is correct
Blocking the hash prevents further execution on other endpoints.
Related concept
Read the scenario before looking for a memorised answer.
✓
Initiate device isolation from the Microsoft Defender for Endpoint console.
Why this is correct
Device isolation contains the threat by disconnecting the device from the network.
Related concept
Read the scenario before looking for a memorised answer.
✗
Disable Windows Defender real-time protection.
Why it's wrong here
Disabling protection would make the situation worse.
✗
Submit the ransomware sample to Microsoft for analysis.
Why it's wrong here
While helpful, this is not a critical containment step; immediate response is priority.
✗
Reimage all affected servers immediately.
Why it's wrong here
Reimaging is a remediation step after containment and evidence collection.
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.
Trap categories for this question
Scenario analysis trap
Disabling protection would make the situation worse.
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: Block the ransomware file hash using threat intelligence indicators in Microsoft Defender. — Options A and C are correct. Option A isolates affected devices to prevent spread. Option C blocks indicators of compromise (IoCs) to stop further execution. Option B is not immediate; Option D is unnecessary if Defender manages updates; Option E is reactive and not a containment step.
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.
About these practice questions
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These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.
Variation 1. Which TWO actions should you take when responding to a confirmed ransomware incident in Microsoft Defender for Endpoint?
hard
✓ A.Run a full antivirus scan on the affected devices.
B.Allow the ransomware executable in the firewall.
C.Collect an investigation package from the affected devices.
✓ D.Isolate the affected devices from the network.
E.Initiate a live response session to delete files.
Why A: Options B and D are correct. Isolating affected devices prevents spread, and running antivirus scans cleans the device. Option A is wrong because allowing malicious files is dangerous. Option C is wrong because collecting investigation package is for analysis, not immediate response. Option E is wrong because initiating live response might be needed but is not a standard first action.
Variation 2. Which TWO actions should you perform to contain a ransomware incident in Microsoft Defender for Endpoint?
medium
A.Reset the local administrator password.
✓ B.Isolate the device from the network.
C.Run a full antivirus scan.
✓ D.Kill the malicious processes.
E.Collect the ransomware sample for analysis.
Why B: Options B and D are correct. Isolating the device prevents further spread, and killing malicious processes stops encryption. Option A is wrong because running antivirus may not be immediate containment. Option C is wrong because resetting passwords is for user accounts, not endpoints. Option E is wrong because collecting files is for investigation, not containment.
Variation 3. Which THREE are valid containment actions in Microsoft Defender for Endpoint? (Choose three.)
hard
A.Reset password
✓ B.Contain device
✓ C.Run antivirus scan
D.Collect investigation package
✓ E.Isolate device
Why B: Options A, B, and D are correct. 'Isolate device', 'Contain device', and 'Run antivirus scan' are built-in actions. Option C is wrong because 'Reset password' is not a containment action in Defender for Endpoint; it is done in Microsoft Entra ID. Option E is wrong because 'Collect investigation package' is a forensic action, not containment.
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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.
Question Discussion
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