312-39 SOC For Cloud Environments Practice Question
You are performing a cloud-native incident response in AWS. You need to isolate a compromised EC2 instance without deleting the volume. What is the standard process?
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
✓
Modify Security Group to deny all traffic
Modifying the Security Group associated with the instance is the standard practice to isolate it while maintaining the state for forensics.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Modify Security Group to deny all traffic
Why this is correct
Modifying the Security Group effectively isolates the instance from the network.
- ✗
Remove the IAM Role
Why it's wrong here
Removing the role limits permissions but does not stop external network connectivity.
- ✗
Disable the VPC
Why it's wrong here
Disabling an entire VPC impacts all production services.
- ✗
Terminate the instance
Why it's wrong here
Terminating deletes the ephemeral state and potentially the disk.
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 →
JA
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
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.