The answer is that the alert name in the query does not match the actual alert name. This is the most likely reason your KQL query returns no results because KQL requires an exact string match when filtering on fields like AlertName; even a minor typo, extra space, or case difference will cause the query to return zero rows, even if the underlying data exists in the SecurityAlert table. On the Microsoft Security Operations Analyst SC-200 exam, this scenario tests your understanding of how KQL syntax interacts with schema fields—a common trap is assuming a query is broken when it is actually filtering on a nonexistent value. When troubleshooting a KQL query that returns no results, always verify that literal strings like alert names, process names, or IP addresses match the data exactly, and check the time range as a secondary step. A simple memory tip: “Exact match or empty batch”—if the name isn’t perfect, the results are zero.
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.
Exhibit
Refer to the exhibit.
```kusto
SecurityAlert
| where AlertName == "Malware detected"
| where TimeGenerated >= ago(1h)
| summarize count() by ComputerName
| where count_ > 3
```
Refer to the exhibit. You are investigating a malware outbreak in Microsoft Sentinel. The KQL query returns no results. What is the most likely reason?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "most likely"
Why it matters: Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
Refer to the exhibit.
```kusto
SecurityAlert
| where AlertName == "Malware detected"
| where TimeGenerated >= ago(1h)
| summarize count() by ComputerName
| where count_ > 3
```
A
The time range is too restrictive.
Why wrong: One hour is reasonable; if no alerts, extending won't help if the name is wrong.
B
The alert name in the query does not match the actual alert name.
Alert names are case-sensitive and must match exactly.
C
No alerts were generated in the last hour.
Why wrong: If no alerts, the query would return no results, but the alert name is the likely issue.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The alert name in the query does not match the actual alert name.
Option B is correct because the alert name must match exactly; 'Malware detected' might not be the correct name. Option A is wrong because if no alerts were generated, the table would be empty but the query would still run. Option C is wrong because the syntax is correct. Option D is wrong because the time filter is not the issue.
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.
✗
The time range is too restrictive.
Why it's wrong here
One hour is reasonable; if no alerts, extending won't help if the name is wrong.
✓
The alert name in the query does not match the actual alert name.
Why this is correct
Alert names are case-sensitive and must match exactly.
Clue confirmation
The clue word "most likely" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
No alerts were generated in the last hour.
Why it's wrong here
If no alerts, the query would return no results, but the alert name is the likely issue.
✗
The query syntax is incorrect.
Why it's wrong here
The syntax is valid.
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: The alert name in the query does not match the actual alert name. — Option B is correct because the alert name must match exactly; 'Malware detected' might not be the correct name. Option A is wrong because if no alerts were generated, the table would be empty but the query would still run. Option C is wrong because the syntax is correct. Option D is wrong because the time filter is not the issue.
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.
Are there clue words in this question I should notice?
Yes — watch for: "most likely". Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
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. Refer to the exhibit. The KQL query runs in Microsoft Sentinel and returns no results. The analyst expects to see failed logon attempts. What is the most likely reason?
easy
A.The Application filter is incorrect.
✓ B.The ResultType field does not exist in IdentityLogonEvents.
C.The summarize operator is misused.
D.The TimeRange variable is too short.
Why B: The query filters on ResultType == 'Failed', but the field is likely named 'Result' or uses different values like 'Failure'. Also, the table 'IdentityLogonEvents' may not exist; it might be 'AADSignInEventsBeta' or similar. But the most common issue is incorrect field name for result type.
Last reviewed: Jun 21, 2026
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