SCS-C02 Threat Detection and Incident Response Practice Question
This SCS-C02 practice question tests your understanding of threat detection and incident response. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. 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.
Refer to the exhibit. A security engineer is reviewing this IAM policy attached to an IAM user. The user reports being unable to download objects from the S3 bucket when connecting from a VPN with IP address 10.0.1.45. What is the most likely reason for the failure?
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.
The policy does not include an Allow effect for s3:GetObject.
Why wrong: The policy likely includes an Allow for s3:GetObject; otherwise, no S3 action would be permitted. The issue is with the condition, not the missing effect.
B
The aws:SourceIp condition key is not supported for IAM user policies; it should be used with IAM role trust policies.
Why wrong: This is false. The `aws:SourceIp` condition key is supported for IAM user policies, but it only evaluates public IP addresses, not private ones.
C
The source IP 10.0.1.45 is not within the allowed range 10.0.0.0/16.
The private IP 10.0.1.45 is within the 10.0.0.0/16 range, but because `aws:SourceIp` ignores private IPs, the condition does not treat it as within the range, causing the denial.
D
The policy uses the wrong action name; it should be s3:GetObjectAcl.
Why wrong: The action name is correct; `s3:GetObject` is the proper action for downloading objects. `s3:GetObjectAcl` retrieves access control lists, not the object itself.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The source IP 10.0.1.45 is not within the allowed range 10.0.0.0/16.
The `aws:SourceIp` condition key only evaluates public IP addresses, not private IPs (RFC 1918) like 10.0.1.45. Therefore, the condition in the policy, which likely allows access from 10.0.0.0/16, never matches for the VPN user, resulting in an implicit deny. Option C is correct because, from the perspective of the condition, the source IP is not within the allowed range.
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 policy does not include an Allow effect for s3:GetObject.
Why it's wrong here
The policy likely includes an Allow for s3:GetObject; otherwise, no S3 action would be permitted. The issue is with the condition, not the missing effect.
✗
The aws:SourceIp condition key is not supported for IAM user policies; it should be used with IAM role trust policies.
Why it's wrong here
This is false. The `aws:SourceIp` condition key is supported for IAM user policies, but it only evaluates public IP addresses, not private ones.
✓
The source IP 10.0.1.45 is not within the allowed range 10.0.0.0/16.
Why this is correct
The private IP 10.0.1.45 is within the 10.0.0.0/16 range, but because `aws:SourceIp` ignores private IPs, the condition does not treat it as within the range, causing the denial.
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.
✗
The policy uses the wrong action name; it should be s3:GetObjectAcl.
Why it's wrong here
The action name is correct; `s3:GetObject` is the proper action for downloading objects. `s3:GetObjectAcl` retrieves access control lists, not the object itself.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap is assuming `aws:SourceIp` works universally with any IP address. Candidates must know that it only evaluates public IPs; private IPs (RFC 1918) are not matched, causing unexpected denials.
Detailed technical explanation
How to think about this question
The `aws:SourceIp` condition key relies on the source IP address from the TCP connection, but in IAM user policies, the condition context is evaluated against the principal's identity, not the network source. This is because IAM user policies are attached to the user and do not have access to the request's network metadata unless the policy is evaluated in a resource-based context (like an S3 bucket policy) or a trust policy. A real-world scenario where this matters is when an organization tries to restrict API access to a corporate VPN using IAM user policies; the policy will silently fail, and the user will get an Access Denied error despite being on the correct IP.
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 media company stores terabytes of video archives that are accessed once a year for audit purposes. Moving these objects to a cold storage tier (Azure Archive, S3 Glacier, or Google Nearline) costs a fraction of hot storage. Questions like this test whether you understand storage tiers, access frequency tradeoffs, and retrieval latency requirements.
Quick reference
AWS S3 Storage Class Comparison
Storage Class
Min Duration
Retrieval
Use Case
S3 Standard
None
Immediate
Frequently accessed data
S3 Standard-IA
30 days
Immediate
Infrequent access, rapid retrieval
S3 One Zone-IA
30 days
Immediate
Non-critical infrequent data
S3 Intelligent-Tiering
None
Immediate–hours
Unknown or changing access patterns
S3 Glacier Instant
90 days
Milliseconds
Archive with instant retrieval
S3 Glacier Flexible
90 days
Minutes–hours
Archive, flexible retrieval
S3 Glacier Deep Archive
180 days
Hours
Long-term compliance archive
What to study next
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Threat Detection and Incident Response — This question tests Threat Detection and Incident Response — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: The source IP 10.0.1.45 is not within the allowed range 10.0.0.0/16. — The `aws:SourceIp` condition key only evaluates public IP addresses, not private IPs (RFC 1918) like 10.0.1.45. Therefore, the condition in the policy, which likely allows access from 10.0.0.0/16, never matches for the VPN user, resulting in an implicit deny. Option C is correct because, from the perspective of the condition, the source IP is not within the allowed range.
What should I do if I get this SCS-C02 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
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.
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