AWS DevOps Interview Questions & Answers (2025)

Here are 20 important interview questions for the AWS DevOps role, categorized for better clarity.

Behavioral Questions

Can you describe a time when you automated a critical process?
I implemented an AWS Lambda function to automate EC2 instance start/stop, reducing manual intervention and cutting costs.
Tell me about a challenging project where you used AWS DevOps tools.
I led a project using AWS CodePipeline and CodeDeploy to automate application deployment, reducing deployment errors by 70%.
Have you ever faced a major production issue? How did you handle it?
Yes, I mitigated a high-latency issue by implementing auto-scaling and optimizing RDS queries.
How do you handle conflicts in a DevOps team?
I encourage open discussions and use retrospectives to analyze root causes, fostering teamwork.
Describe a time you improved CI/CD pipelines.
I optimized a Jenkins pipeline by integrating caching, reducing build time from 30 to 10 minutes.

If an AWS service suddenly fails, how would you respond?
I would check CloudWatch logs, analyze metrics, and use AWS Health Dashboard for updates before implementing a rollback or failover strategy.
You need to migrate a legacy application to AWS. What approach would you take?
I would analyze current dependencies, choose a lift-and-shift or modernization strategy, and ensure minimal downtime with blue-green deployment.
What would you do if a deployment caused unexpected downtime?
I would roll back using CodeDeploy’s automatic rollback feature and analyze logs for root cause analysis.
Your team is resistant to adopting DevOps practices. How do you persuade them?
I would demonstrate the benefits of automation, continuous integration, and faster recovery times using small proof-of-concept projects.
How would you handle security incidents in AWS?
I would enable AWS GuardDuty, analyze security logs, revoke compromised credentials, and apply IAM best practices.

What is the difference between CI and CD?
CI (Continuous Integration) ensures automated builds and testing, while CD (Continuous Deployment) automates delivery to production.
What AWS services are commonly used in DevOps?
Services like AWS CodePipeline, CodeBuild, CodeDeploy, ECS, Lambda, and CloudFormation are essential for automation.
How does auto-scaling work in AWS?
Auto-scaling adjusts EC2 instances dynamically based on demand, ensuring availability and cost optimization.
Explain Blue-Green Deployment.
It involves running two environments—Blue (current) and Green (new)—to ensure seamless switching with minimal downtime.
What is Infrastructure as Code (IaC)?
IaC automates infrastructure management using tools like AWS CloudFormation or Terraform, ensuring consistency.

How do you stay updated with AWS DevOps trends?
I follow AWS blogs, attend re:Invent, and engage in online communities like AWS DevOps forums.
How do you approach collaboration between Dev and Ops teams?
I promote shared ownership, regular stand-ups, and use DevOps tools like Terraform and Kubernetes for transparency.
What does DevOps mean to you?
DevOps is a culture emphasizing automation, collaboration, and continuous improvement to enhance software delivery.
How do you handle pressure in high-stakes deployments?
I rely on robust monitoring, canary deployments, and pre-defined rollback strategies to mitigate risks.
Why do you want to work at our company?
Your company’s commitment to innovation and cloud adoption aligns with my passion for DevOps automation.