The correct answer is to enable S3 server access logging and use Amazon Athena to query those logs, with CloudWatch Events to alert on specific patterns. This combination works because server access logs capture every request made to a bucket, including the requester identity, action, and response status, allowing you to detect public read access by filtering for GET requests from an anonymous principal. On the AWS Certified Security Specialty SCS-C02 exam, this scenario tests your understanding of how to combine logging, querying, and event-driven alerting for comprehensive visibility, often appearing as a multi-service integration question. A common trap is choosing CloudTrail alone, which logs management events but not detailed object-level reads, or relying solely on S3 Inventory, which lacks real-time request data. Memory tip: think “Logs, Query, Alert” for the three-layer approach to detecting public reads.
SCS-C02 Security Logging and Monitoring Practice Question
This SCS-C02 practice question tests your understanding of security logging and monitoring. 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.
A company stores sensitive data in Amazon S3 and wants to detect and alert on any public read access to objects. Which combination of services provides the most comprehensive solution?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Enable S3 server access logging and use Amazon Athena to query logs, with CloudWatch Events to alert on specific patterns
Option C is correct because S3 server access logs capture detailed records of all requests made to a bucket, including the requester, bucket name, request time, action, and response status. By using Amazon Athena to query these logs and CloudWatch Events to trigger alerts on patterns indicating public read access (e.g., a specific HTTP method like GET from an anonymous principal), you can detect and alert on unauthorized public reads comprehensively. This combination provides granular, queryable logging with event-driven alerting, covering both current and historical access patterns.
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.
✗
Enable VPC Flow Logs and analyze for S3 traffic
Why it's wrong here
Flow logs do not differentiate between public and private access.
✗
Use AWS Config rules to check for public bucket policies and alert via SNS
Why it's wrong here
Config checks policies, not object access.
✓
Enable S3 server access logging and use Amazon Athena to query logs, with CloudWatch Events to alert on specific patterns
Why this is correct
Server access logs record requester, so public reads can be identified.
Related concept
Read the scenario before looking for a memorised answer.
✗
Enable S3 event notifications for all object-level events and send to Amazon SNS
Why it's wrong here
Event notifications do not include read access details.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse S3 event notifications (which only cover write/delete events) with server access logs (which cover all operations including reads), leading them to choose Option D, which cannot detect read access at all.
Detailed technical explanation
How to think about this question
S3 server access logs are delivered on a best-effort basis, typically within a few hours, and include fields like 'Remote IP', 'Requester' (with 'Anonymous' for unauthenticated requests), 'Operation' (e.g., REST.GET.OBJECT), and 'HTTP Status'. Athena uses Presto-based SQL to query these logs directly from S3, enabling complex pattern matching (e.g., WHERE requester='Anonymous' AND operation LIKE '%GET%'). CloudWatch Events can then use a rule with an event pattern matching Athena query results published to CloudWatch Logs, or you can use S3 Event Notifications to CloudWatch Events for real-time alerts on specific log entries, though the latter requires additional setup like Lambda to parse logs.
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.
Security Logging and Monitoring — This question tests Security Logging and Monitoring — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Enable S3 server access logging and use Amazon Athena to query logs, with CloudWatch Events to alert on specific patterns — Option C is correct because S3 server access logs capture detailed records of all requests made to a bucket, including the requester, bucket name, request time, action, and response status. By using Amazon Athena to query these logs and CloudWatch Events to trigger alerts on patterns indicating public read access (e.g., a specific HTTP method like GET from an anonymous principal), you can detect and alert on unauthorized public reads comprehensively. This combination provides granular, queryable logging with event-driven alerting, covering both current and historical access patterns.
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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