Incident Response →mediumMultiple ChoiceObjective-mapped

312-39 Incident Response Practice Question

You are performing triage for an alert involving unauthorized access to an S3 bucket. Which service would you consult to review the API calls made to that bucket?

Answer choices

Why each option matters

Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.

Correct answer & explanation

✓

AWS CloudTrail

AWS CloudTrail logs all API calls made within an AWS account, including S3 operations.

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 GuardDuty
Why it's wrong here
GuardDuty is for threat detection, not raw API log review.
✓
AWS CloudTrail
Why this is correct
CloudTrail records all API activity.
✗
AWS Config
Why it's wrong here
Config tracks resource state changes, not API logs.
✗
AWS IAM Access Analyzer
Why it's wrong here
This is for permission auditing.

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

About these practice questions

Courseiva writes every 312-39 question from scratch — 201 in total, each with an explanation and a wrong-answer breakdown. None are copied from real exams or dumps. Learn why practice questions differ from exam dumps →

How Courseiva writes practice questions · Editorial policy

Written and reviewed by Johnson Ajibi, MSc IT Security

Senior Network & Security Engineer · founder of Courseiva

Last reviewed August 2026 · checked against the official EC-Council exam blueprint

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This 312-39 practice question is part of Courseiva's free EC-Council 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 312-39 exam.