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Home/Questions/Cloud/Tools/Describe an AWS EC2 instance and how IAM roles/policies enhance security.

Describe an AWS EC2 instance and how IAM roles/policies enhance security.

Cloud/Toolseasy0.5 min readPremium
Frequency
Low
Asked at 1 company
Category
179
questions in Cloud/Tools
Difficulty Split
104E|27M|48H
in this category
Total Bank
1,863
across 7 categories
Asked at these companies
Chryselys
Interview Pro Tip

Red Flag: Mentioning storing AWS keys in config files or env vars. Pro-Move: 'Every EC2 gets an instance profile; we use permission boundaries to limit role escalation—zero keys in code.'

Key Concepts Tested
etl
Expert AnswerPremium
100 wordsInterview-ready
Architectural logic: EC2 = compute; IAM roles = identity without long-lived keys. Why roles matter: Embedded access keys are a top breach vector; roles use instance metadata for temporary credentials that rotate automatically. Flow: Attach role at launch → app uses default credential chain (boto3, SDK) → no keys in code. Policies define S3, Secrets Manager, etc. Scalability: One role can serve many instances; policies scale via JSON. Cost: No extra cost for roles....
The complete answer continues with detailed implementation patterns, architectural trade-offs, and production-grade considerations. It covers performance optimization strategies, common pitfalls to avoid, and real-world examples from companies like Chryselys. The answer also includes follow-up discussion points that interviewers commonly explore.

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