Question 1hardmultiple choice
Full question →hardmultiple choiceObjective-mapped
A security analyst in Microsoft Sentinel wants to correlate Microsoft Entra ID sign-in logs with IP addresses known to be associated with a threat actor. The threat actor's IPs are stored in a custom table named 'ThreatIntelligence_IP' that is ingested daily. The analyst needs to create an analytics rule that triggers only when a sign-in occurs from one of these IPs AND when the user is not in a list of approved users (stored in another custom table 'ApprovedUsers'). Which KQL query pattern should the analyst use to achieve this correlation and filtering?
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.
A
Distractor review
SigninLogs | join ThreatIntelligence_IP on IPAddress | where UserId notin (ApprovedUsers | project UserId)
This uses a subquery to filter UserId, but it does not use a proper anti-join; the 'notin' operator may be inefficient and not as clear as an anti-join.
B
Distractor review
SigninLogs | where IPAddress in (ThreatIntelligence_IP | project IPAddress) and UserId !in (ApprovedUsers | project UserId)
Using 'in' and '!in' with subqueries is valid but less performant than joins for large tables. Also, '!in' is not a KQL operator; the correct operator is '!in' is not valid; should be 'notin'.
C
Best answer
SigninLogs | join kind=inner ThreatIntelligence_IP on IPAddress | join kind=leftanti (ApprovedUsers | project UserId) on $left.UserId == $right.UserId
This query first performs an inner join to keep only sign-ins from threat actor IPs, then a left anti join to exclude sign-ins from approved users. This is the most efficient and clear pattern.
D
Distractor review
SigninLogs | join ThreatIntelligence_IP on IPAddress | where not(UserId in (ApprovedUsers | project UserId))
While this works logically, using a join followed by a 'where not in' subquery is less efficient than an anti-join.
Common exam trap
Common exam trap: NAT rules depend on direction and matching traffic
NAT is not only about the public address. The inside/outside interface roles and the ACL or rule that matches traffic are just as important.
Technical deep dive
How to think about this question
NAT questions usually test address translation, overload/PAT behaviour, static mappings and whether the right traffic is being translated. Read the interface direction and address terms carefully.
KKey Concepts to Remember
- Static NAT maps one inside address to one outside address.
- PAT allows many inside hosts to share one public address using ports.
- Inside local and inside global describe the private and translated addresses.
- NAT ACLs identify traffic for translation, not always security filtering.
TExam Day Tips
- Identify inside and outside interfaces first.
- Check whether the scenario needs static NAT, dynamic NAT or PAT.
- Do not confuse NAT matching ACLs with normal packet-filtering intent.
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
A Microsoft Sentinel scheduled analytics rule detects impossible travel but creates too many duplicate incidents for the same user within a short period. Which two rule settings should you tune? (Choose 2.)
Question 2
A phishing email was delivered to several users. The analyst wants to find all messages in the campaign, see delivery actions, and perform remediation from the Microsoft 365 Defender portal. Which tool should they use?
Question 3
A security analyst in Microsoft Defender for Cloud receives an alert that an Azure VM has a vulnerability with a high severity. The analyst wants to see the detailed finding, including the steps to remediate. Which blade or page should the analyst open?
Question 4
A company uses Microsoft Defender for Cloud to protect an Azure Kubernetes Service (AKS) cluster. The security team wants to receive security alerts about suspicious activities within the cluster, such as a container running with root privileges or attempts to read sensitive host paths. Which Defender for Cloud plan must be enabled to generate these alerts?
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?
Static NAT maps one inside address to one outside address.
What is the correct answer to this question?
The correct answer is: SigninLogs | join kind=inner ThreatIntelligence_IP on IPAddress | join kind=leftanti (ApprovedUsers | project UserId) on $left.UserId == $right.UserId — To join two custom tables and filter based on conditions, the analyst should use the join operator to match rows from SigninLogs with ThreatIntelligence_IP on the IP address field, then use a left anti join with ApprovedUsers to exclude sign-ins from approved users. The other options either misapply join types or do not filter correctly.
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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