Real-Time AWS DevOps Interview Questions & Answers:
1️⃣ What is the difference between CodeBuild, CodeDeploy, and CodePipeline?
✅ AWS CodeBuild → Compiles code, runs tests, and creates artifacts.
✅ AWS CodeDeploy → Automates application deployment across EC2, Lambda, or on-prem servers.
✅ AWS CodePipeline → CI/CD service that automates the entire release process by integrating CodeBuild and third-party tools.
2️⃣ How does AWS handle container orchestration?
✅ ECS: AWS-managed service using the EC2 launch type or AWS Fargate (serverless).
✅ EKS: Fully managed Kubernetes service for running containerized workloads.
3️⃣ How does AWS Lambda fit into DevOps?
👉 AWS Lambda is a serverless compute service that runs code in response to events, making it ideal for automating CI/CD workflows, infrastructure monitoring, and log processing.
4️⃣ What is the purpose of AWS Elastic Beanstalk in DevOps?
👉 Elastic Beanstalk provides PaaS (Platform-as-a-Service), automatically managing infrastructure, scaling, and deployment for applications written in Python, Node.js, Java, etc.
5️⃣ How do you implement Infrastructure as Code (IaC) in AWS?
✅ Terraform → Multi-cloud, declarative, open-source.
✅ CloudFormation → AWS-native, used to define & provision AWS infrastructure.
✅ AWS CDK → Infrastructure as Code using TypeScript, Python, and other languages.
6️⃣ What is the difference between Blue-Green and Canary Deployments?
✅ Blue-Green Deployment → Deploys new code to a separate environment (Green), switches traffic once validated.
✅ Canary Deployment → Gradually shifts traffic to the new version to detect issues early.
7️⃣ How does AWS CloudWatch help in DevOps monitoring?
👉 AWS CloudWatch monitors logs, metrics, and events to detect anomalies, trigger alarms, and automate responses via Lambda or Auto Scaling.
✅ Use Case: Set up an alert for high CPU utilization on EC2, triggering an Auto Scaling event.
8️⃣ What is AWS Systems Manager, and how does it help DevOps teams?
👉 AWS Systems Manager provides centralized management for EC2, on-prem servers, and applications, enabling:
✅ Patch Management
✅ Automated Operations (SSM Run Command, State Manager)
✅ Secure Parameter Storage (AWS SSM Parameter Store)
9️⃣ How do you secure AWS DevOps pipelines?
✅ Use IAM roles & least privilege access
✅ Encrypt sensitive data using AWS Secrets Manager
✅ Enable MFA & rotate credentials regularly
✅ Monitor pipeline activities with AWS CloudTrail
🔟 What is AWS Fault Injection Simulator (FIS)?
👉 AWS FIS allows DevOps teams to simulate failures
(latency, CPU spikes, network disruptions) to test application resilience and improve system reliability.
1May 25, 2025 1K 8
