The answer is Amazon GuardDuty and AWS Security Hub. GuardDuty continuously monitors for suspicious API activity across accounts by analyzing CloudTrail logs, VPC Flow Logs, and DNS data, while Security Hub aggregates all GuardDuty findings into a single administrator account, providing a centralized view for multi-account environments. On the AWS Certified Security Specialty SCS-C02 exam, this pairing tests your understanding of how to combine a detection service with a centralized findings aggregator; a common trap is choosing Amazon Detective instead of Security Hub, but Detective is for deep forensic investigation after a finding, not for multi-account aggregation. Remember: GuardDuty detects the threat, Security Hub collects the alerts—think of GuardDuty as the watchtower and Security Hub as the command center.
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.
A security engineer is designing a threat detection solution for a multi-account AWS environment. The engineer needs to detect and respond to suspicious API activity across all accounts. Which TWO services should be used together to achieve this? (Choose two.)
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Amazon GuardDuty
Amazon GuardDuty is a threat detection service that continuously monitors for malicious or unauthorized behavior across AWS accounts, including suspicious API activity. By enabling GuardDuty in all accounts and aggregating findings to a central administrator account, it provides the necessary detection layer for multi-account environments.
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 CloudWatch
Why it's wrong here
CloudWatch is for monitoring metrics and logs, not threat detection.
✓
Amazon GuardDuty
Why this is correct
GuardDuty analyzes CloudTrail, DNS, and VPC Flow Logs for threats.
Related concept
Read the scenario before looking for a memorised answer.
✓
AWS Security Hub
Why this is correct
Security Hub aggregates GuardDuty findings across accounts for centralized view.
Related concept
Read the scenario before looking for a memorised answer.
✗
Amazon Inspector
Why it's wrong here
Inspector assesses vulnerabilities, not suspicious API activity.
✗
AWS Config
Why it's wrong here
Config tracks resource configurations, not threat detection.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse AWS Security Hub (a findings aggregation and compliance service) with a primary detection tool, but Security Hub itself does not generate threat detections—it ingests findings from GuardDuty and other services, so both are needed together.
Detailed technical explanation
How to think about this question
GuardDuty uses machine learning, anomaly detection, and integrated threat intelligence from AWS and third-party sources (e.g., CrowdStrike, Proofpoint) to analyze CloudTrail management events, VPC Flow Logs, and DNS logs. In a multi-account setup, you designate a GuardDuty administrator account that can manage member accounts and centrally view findings, enabling a single pane of glass for threat detection across the entire organization.
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 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.
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: Amazon GuardDuty — Amazon GuardDuty is a threat detection service that continuously monitors for malicious or unauthorized behavior across AWS accounts, including suspicious API activity. By enabling GuardDuty in all accounts and aggregating findings to a central administrator account, it provides the necessary detection layer for multi-account environments.
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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