The correct answer is that the query’s primary purpose is to detect potentially malicious PowerShell commands that are obfuscated. This is because the KQL filters specifically for processes named powershell.exe that include an encoded command parameter, a technique attackers commonly use to hide malicious scripts from plain-text detection. On the Microsoft 365 Administrator MS-102 exam, this question tests your ability to interpret advanced hunting queries in Microsoft Defender XDR, focusing on common obfuscation patterns rather than user, device, or broad time-based filters. A frequent trap is assuming the query targets specific users or devices, but the absence of those fields in the query makes those options incorrect. For a quick memory tip, remember that “encoded” in a PowerShell command signals obfuscation, so when you see -EncodedCommand in a hunting query, think “hidden malicious intent.”
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.
Exhibit
Refer to the exhibit.
```kusto
DeviceProcessEvents
| where Timestamp > ago(7d)
| where FileName == "powershell.exe"
| where ProcessCommandLine has "-EncodedCommand"
| project Timestamp, DeviceName, AccountName, ProcessCommandLine
| take 10
```
You run the KQL query shown in the exhibit in Microsoft Defender XDR advanced hunting. What is the primary purpose of this query?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "primary"
Why it matters: Asks for the main purpose or function, not a secondary benefit. Eliminate answers that describe side-effects or partial functions.
Refer to the exhibit.
```kusto
DeviceProcessEvents
| where Timestamp > ago(7d)
| where FileName == "powershell.exe"
| where ProcessCommandLine has "-EncodedCommand"
| project Timestamp, DeviceName, AccountName, ProcessCommandLine
| take 10
```
A
Identify all PowerShell activity from a specific user
Why wrong: The query does not filter by user.
B
Detect potentially malicious PowerShell commands that are obfuscated
Encoded commands are often used to hide malicious intent.
C
Find PowerShell processes running on a specific device
Why wrong: The query does not filter by device.
D
List all PowerShell executions in the last 7 days
Why wrong: The query excludes non-encoded commands.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Detect potentially malicious PowerShell commands that are obfuscated
Option B is correct because the query filters for powershell.exe processes with an encoded command, which is commonly used to obfuscate malicious commands. Option A is wrong because the query does not filter for specific users. Option C is wrong because the query does not filter by device. Option D is wrong because the query does not filter by time other than the last 7 days.
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.
✗
Identify all PowerShell activity from a specific user
Why it's wrong here
The query does not filter by user.
✓
Detect potentially malicious PowerShell commands that are obfuscated
Why this is correct
Encoded commands are often used to hide malicious intent.
Clue confirmation
The clue word "primary" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
Find PowerShell processes running on a specific device
Why it's wrong here
The query does not filter by device.
✗
List all PowerShell executions in the last 7 days
Why it's wrong here
The query excludes non-encoded commands.
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
Command / output trap
The query excludes non-encoded commands.
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 MS-102 question in full detail.
Identify which MS-102 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.
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: Detect potentially malicious PowerShell commands that are obfuscated — Option B is correct because the query filters for powershell.exe processes with an encoded command, which is commonly used to obfuscate malicious commands. Option A is wrong because the query does not filter for specific users. Option C is wrong because the query does not filter by device. Option D is wrong because the query does not filter by time other than the last 7 days.
What should I do if I get this MS-102 question wrong?
Identify which MS-102 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: "primary". Asks for the main purpose or function, not a secondary benefit. Eliminate answers that describe side-effects or partial functions.
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. You run the KQL query in advanced hunting. What is the primary purpose of this query?
hard
A.Identify devices with outbound connections to malicious IPs
B.Identify devices with PowerShell execution policy set to bypass
C.Identify devices where a user deleted system files using cmd
✓ D.Identify devices with high use of encoded commands, which may indicate malicious activity
Why D: Option C is correct because the query looks for PowerShell or cmd.exe processes using -EncodedCommand, which is a common technique for obfuscating malicious commands. Option A is wrong because the query doesn't filter by execution policy. Option B is wrong because the query doesn't look for files being deleted. Option D is wrong because the query doesn't look for outbound connections.
Last reviewed: Jun 21, 2026
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