AWS Cloud Engineer interview question · Most asked
What are the most important security controls for EC2?
Summary
Secure EC2 with least privilege, network boundaries, encryption, logging, and continuous configuration checks.
Longer Answer
The concrete controls for EC2 are IAM instance profiles, least-privilege security groups, IMDSv2, SSM Session Manager, encrypted EBS volumes, patching, and hardened AMIs. Security design should cover identity, ingress, egress, secrets, auditability, patching/configuration, and blast-radius reduction.
A strong answer avoids vague 'use IAM' language and names who can call what, from where, with which credentials, and how violations are detected.
Key Points
- The concrete controls for EC2 are IAM instance profiles, least-privilege security groups, IMDSv2, SSM Session Manager, encrypted EBS volumes, patching, and hardened AMIs
- Security design should cover identity, ingress, egress, secrets, auditability, patching/configuration, and blast-radius reduction
- A strong answer avoids vague 'use IAM' language and names who can call what, from where, with which credentials, and how violations are detected
- For 'What are the most important security controls for EC2?', interviewers are looking for a decision process: state the requirement, name the AWS mechanism, describe the limit or failure mode, and explain how you would verify it in production. A strong answer avoids vague 'use IAM' language and names who can call what, from where, with which credentials, and how violations are detected.
Use the comparison table to show that you understand tradeoffs rather than memorizing a single preferred service
Comparison / Tradeoffs
| Aspect | Notes |
|---|---|
| Core idea | Secure EC2 with least privilege, network boundaries, encryption, logging, and continuous configuration checks. |
| Practical tradeoff | For 'What are the most important security controls for EC2?', interviewers are looking for a decision process: state the requirement, name the AWS mechanism, describe the limit or failure mode, and explain how you would verify it in production. A strong answer avoids vague 'use IAM' language and names who can call what, from where, with which credentials, and how violations are detected. |
Use the comparison table to show that you understand tradeoffs rather than memorizing a single preferred service. |
Explanation
Summary
Secure EC2 with least privilege, network boundaries, encryption, logging, and continuous configuration checks.
Longer Answer
For 'What are the most important security controls for EC2?', interviewers are looking for a decision process: state the requirement, name the AWS mechanism, describe the limit or failure mode, and explain how you would verify it in production. A strong answer avoids vague 'use IAM' language and names who can call what, from where, with which credentials, and how violations are detected.
Use the comparison table to show that you understand tradeoffs rather than memorizing a single preferred service.
Key Points
- For 'What are the most important security controls for EC2?', interviewers are looking for a decision process: state the requirement, name the AWS mechanism, describe the limit or failure mode, and explain how you would verify it in production
- A strong answer avoids vague 'use IAM' language and names who can call what, from where, with which credentials, and how violations are detected
- Use the comparison table to show that you understand tradeoffs rather than memorizing a single preferred service
- Use the answer to connect the concept back to a realistic production or interview scenario for 'What are the most important security controls for EC2?'
Comparison / Tradeoffs
| Aspect | Notes |
|---|---|
| Core idea | Secure EC2 with least privilege, network boundaries, encryption, logging, and continuous configuration checks. |
| Practical tradeoff | In an interview, relate 'What are the most important security controls for EC2?' to implementation decisions, tradeoffs, and operational impact. |
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