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.
A security engineer is investigating a potential data exfiltration from an S3 bucket. Which AWS service should be used to analyze the VPC Flow Logs for the S3 bucket's endpoint?
Amazon Macie
Why wrong: Macie is for discovering sensitive data, not analyzing flow logs.
Amazon Inspector
Why wrong: Inspector is for vulnerability assessment, not flow log analysis.
Amazon GuardDuty
Why wrong: GuardDuty is a threat detection service but does not natively analyze VPC Flow Logs for detailed investigation.
Amazon Detective
Detective analyzes VPC Flow Logs, CloudTrail, and other logs to investigate security events.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
Amazon Detective
Amazon Detective is the correct service because it can ingest and analyze VPC Flow Logs, including those for a VPC endpoint used to access an S3 bucket. Detective uses machine learning, statistical analysis, and graph theory to identify the root cause of suspicious network traffic patterns, such as unusual data volumes or connections to external IPs, which are indicative of data exfiltration.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
Amazon Macie
Why it's wrong here
Macie is for discovering sensitive data, not analyzing flow logs.
Amazon Inspector
Why it's wrong here
Inspector is for vulnerability assessment, not flow log analysis.
Amazon GuardDuty
Why it's wrong here
GuardDuty is a threat detection service but does not natively analyze VPC Flow Logs for detailed investigation.
Amazon Detective
Why this is correct
Detective analyzes VPC Flow Logs, CloudTrail, and other logs to investigate security events.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
The trap here is that candidates confuse Amazon GuardDuty's alerting capability with Amazon Detective's investigative analysis, forgetting that GuardDuty generates findings but Detective is needed for deep forensic analysis of VPC Flow Logs to understand the full scope of an incident.
Detailed technical explanation
VPC Flow Logs capture metadata about IP traffic going to and from network interfaces in a VPC, including traffic through a VPC endpoint for S3 (which uses a Gateway endpoint or an Interface endpoint). Amazon Detective ingests these logs and builds a graph model of resource interactions, allowing security engineers to visually trace the flow of data from the S3 bucket to external destinations. In a real-world scenario, an engineer would use Detective to correlate a spike in bytes transferred via the S3 endpoint with a specific EC2 instance and its outbound connections, identifying the exfiltration path.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
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
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FAQ
Threat Detection and Incident Response — This question tests Threat Detection and Incident Response — Read the scenario before looking for a memorised answer..
The correct answer is: Amazon Detective — Amazon Detective is the correct service because it can ingest and analyze VPC Flow Logs, including those for a VPC endpoint used to access an S3 bucket. Detective uses machine learning, statistical analysis, and graph theory to identify the root cause of suspicious network traffic patterns, such as unusual data volumes or connections to external IPs, which are indicative of data exfiltration.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 24, 2026
This SCS-C02 practice question is part of Courseiva's free Amazon Web Services certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the SCS-C02 exam.
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