A security analyst wants to create a custom detection rule in Microsoft Sentinel that alerts when a user logs in from an IP address that is not in the company's approved IP range. The analyst has an existing watchlist named 'ApprovedIPs' containing the allowed ranges. Which KQL operator should the analyst use to compare the IP address from the SigninLogs table against the watchlist?
Answer choices
Why each option matters
Good practice is not just finding the correct option. The wrong answers often show the exact trap the exam wants you to fall into.
Distractor review
join
While 'join' can merge tables, it is not the recommended operator for watchlist enrichment. 'lookup' is optimized for this purpose and is more efficient.
Best answer
lookup
Correct. The 'lookup' operator seamlessly enriches query results with data from a watchlist, making it ideal for comparing IP addresses against known approved ranges.
Distractor review
evaluate
'evaluate' is used to invoke specific KQL plugins (e.g., machine learning models) and does not perform watchlist matching.
Distractor review
where
'where' filters rows based on conditions but cannot directly reference external watchlist data. You would need to use 'lookup' first to enrich the data.
Common exam trap
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.
Technical deep dive
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.
Related practice questions
Related SC-200 practice-question pages
Use these pages to review the topic behind this question. This is how one missed question becomes focused revision.
More questions from this exam
Keep practising from the same exam bank, or move into a focused topic page if this question exposed a weak area.
Question 1
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Question 2
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Question 3
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Question 4
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Question 5
A security analyst is configuring Microsoft Sentinel scheduled analytics rules to detect brute-force attacks on Microsoft Entra ID. Arrange the steps in the correct order from first to last.
Question 6
An organization uses Microsoft 365 Defender. A security analyst is investigating a malware incident on a user's device. The automated investigation and response (AIR) has already isolated the device from the network. The analyst now needs to collect a copy of a specific suspicious file from the device for further analysis. Which action should the analyst initiate from the device's entity page?
FAQ
Questions learners often ask
What does this SC-200 question test?
Read the scenario before looking for a memorised answer.
What is the correct answer to this question?
The correct answer is: lookup — The 'lookup' operator is used in KQL to enrich data with a watchlist or external data source. It allows you to match rows from one table with rows from another based on key fields and return additional columns. In this scenario, using 'lookup' with the watchlist will let the analyst quickly determine if an IP address falls within the approved ranges. The 'join' operator is for joining two tables but is less efficient for watchlist enrichment. 'evaluate' is used for plugin functions like machine learning, and 'where' is for simple filtering.
What should I do if I get this SC-200 question wrong?
Then try more questions from the same exam bank and focus on understanding why the wrong options are tempting.
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