DevOps Interview questions

🔍 I recently attended a DevOps interview – here are the questions they asked me:
💼 1. What is your role in your project?
🌐 2. What is VPC Peering and how does it work?
🧾 3. Write Terraform code to create 5 EC2 instances with different names and sizes.
👥 4. How to check the last 5 users who logged into a Linux system?
🐳 5. What is a multi-stage Dockerfile? Can we use the second stage as the first?
🌍 6. How does an application communicate with the outside world?
🔁 7. A pod is in CrashLoopBackOff. How do you troubleshoot it?
🔧 8. What are the types of services in Kubernetes?
🧠 9. What is a headless service in Kubernetes?
⚙️ 10. Write a Dockerfile for a ReactJS application.
📉 11. In a Kubernetes cluster, one ReplicaSet is not working. How do you debug it?
🖥️ 12. How to check CPU usage of a system?
☁️ 13. What AWS services are used in your project?
🚀 14. What are the CI/CD steps while developing?
🔄 15. Write a CI/CD pipeline to build and push a Node.js app image to Docker Hub.
These weren’t just theory — they tested real-world knowledge of Terraform, Kubernetes, Docker, AWS, and CI/CD 🛠️
👉 Hope this helps anyone preparing for DevOps interviews.