MS-102 Practice Question: Manage security and threats by using Microsoft Defender XDR
This MS-102 practice question tests your understanding of manage security and threats by using microsoft defender xdr. 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.
A security analyst wants to create a custom detection rule in Microsoft 365 Defender that triggers when a PowerShell process with suspicious command-line arguments is detected on a device, and within 5 minutes, an outbound network connection to a known malicious IP occurs. Which two advanced hunting tables must be joined in the KQL query?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
DeviceProcessEvents and DeviceNetworkEvents
Option A is correct because the detection rule requires correlating a PowerShell process event (stored in DeviceProcessEvents) with a subsequent outbound network connection to a known malicious IP (stored in DeviceNetworkEvents). Joining these two tables on the device ID and timestamp within a 5-minute window allows the KQL query to identify the specific sequence of process execution followed by network activity, which is the core behavior being monitored.
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.
✓
DeviceProcessEvents and DeviceNetworkEvents
Why this is correct
Correct. These two tables contain the necessary process and network connection data for the scenario.
Related concept
Read the scenario before looking for a memorised answer.
✗
EmailEvents and DeviceNetworkEvents
Why it's wrong here
EmailEvents captures email events, not process creation, so it does not help detect the described behavior.
✓
DeviceEvents and DeviceProcessEvents
Why this is correct
DeviceEvents covers general device events but not network connections; DeviceProcessEvents alone is insufficient.
Related concept
Read the scenario before looking for a memorised answer.
✗
IdentityLogonEvents and DeviceNetworkEvents
Why it's wrong here
IdentityLogonEvents captures logon events, not process creation, making it unsuitable for this detection.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates may confuse DeviceEvents (which sounds like it covers all events) with the specific process and network tables, or incorrectly assume EmailEvents or IdentityLogonEvents are relevant to endpoint-based detection rules, when in fact only DeviceProcessEvents and DeviceNetworkEvents contain the precise telemetry needed for process-to-network correlation.
Detailed technical explanation
How to think about this question
Under the hood, the join in KQL would typically use a time-windowed join (e.g., `join kind=inner on $left.DeviceId == $right.DeviceId and $right.Timestamp between ($left.Timestamp .. ($left.Timestamp + 5m))`) to ensure the network event occurs within 5 minutes after the process event. The DeviceProcessEvents table includes fields like `ProcessCommandLine` and `FileName` to identify suspicious PowerShell arguments, while DeviceNetworkEvents includes `RemoteIP` and `RemotePort` to match against threat intelligence feeds of known malicious IPs. In a real-world scenario, this rule could detect a PowerShell-based reverse shell that establishes a C2 connection shortly after execution.
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.
TExam Day Tips
→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 company's IT admin needs to give a contractor read-only access to production logs without sharing account credentials. Using role-based access control (RBAC) and temporary scoped permissions — not a permanent shared password — is the correct pattern. Questions like this test whether you can apply least-privilege access across cloud identity services.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this MS-102 question in full detail.
Manage security and threats by using Microsoft Defender XDR — This question tests Manage security and threats by using Microsoft Defender XDR — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: DeviceProcessEvents and DeviceNetworkEvents — Option A is correct because the detection rule requires correlating a PowerShell process event (stored in DeviceProcessEvents) with a subsequent outbound network connection to a known malicious IP (stored in DeviceNetworkEvents). Joining these two tables on the device ID and timestamp within a 5-minute window allows the KQL query to identify the specific sequence of process execution followed by network activity, which is the core behavior being monitored.
What should I do if I get this MS-102 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
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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