SCS-C02 Threat Detection and Incident Response Practice Question
This SCS-C02 practice question tests your understanding of threat detection and incident response. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. 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 engineer is investigating a potential data exfiltration from an S3 bucket that is configured to allow public access. The engineer wants to determine who accessed the bucket and from which IP addresses. Which AWS capability should be used?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
AWS CloudTrail data events for S3
AWS CloudTrail data events for S3 capture detailed API activity at the object level, including GetObject, PutObject, and DeleteObject calls. This allows the security engineer to identify exactly who accessed the bucket (via the user identity) and from which IP address (via the sourceIPAddress field in the CloudTrail event). Unlike management events, data events must be explicitly enabled and provide the granularity needed for this investigation.
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.
✗
Amazon S3 server access logs
Why it's wrong here
S3 server access logs provide request details, but are delivered periodically and not real-time.
✗
AWS IAM Access Analyzer
Why it's wrong here
Access Analyzer analyzes policies, not access logs.
✓
AWS CloudTrail data events for S3
Why this is correct
CloudTrail data events log S3 object-level operations with source IP and user identity.
Related concept
Read the scenario before looking for a memorised answer.
✗
Amazon VPC Flow Logs
Why it's wrong here
VPC Flow Logs capture IP traffic to S3 endpoints, but not the API calls themselves.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse S3 server access logs (which also log IPs and request details) with CloudTrail data events, but server access logs lack IAM user identity information and are not integrated with AWS CloudTrail's centralized audit trail, making CloudTrail the correct choice for identity-aware investigation.
Detailed technical explanation
How to think about this question
CloudTrail data events for S3 are logged as JSON records that include the 'userIdentity' (e.g., IAM user, role, or federated user), 'sourceIPAddress', 'eventName' (e.g., GetObject), and 'requestParameters' such as bucket name and object key. These events are delivered to an S3 bucket or CloudWatch Logs within minutes, and they support both standard and SSE-KMS encrypted objects. A common subtlety is that data events must be enabled per bucket or per trail, and they incur additional costs; also, if the bucket has a bucket policy that denies logging, CloudTrail may still log the denied request.
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.
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: AWS CloudTrail data events for S3 — AWS CloudTrail data events for S3 capture detailed API activity at the object level, including GetObject, PutObject, and DeleteObject calls. This allows the security engineer to identify exactly who accessed the bucket (via the user identity) and from which IP address (via the sourceIPAddress field in the CloudTrail event). Unlike management events, data events must be explicitly enabled and provide the granularity needed for this investigation.
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.
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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