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DevOps Interview Preparation Roadmap

Overview

This roadmap provides structured learning paths for DevOps interview preparation over 30, 60, and 90-day periods. Choose the timeline that fits your schedule and current knowledge level.

30-Day Intensive Sprint

Week 1: Foundations (Days 1-7)

Day 1-2: Linux Fundamentals

  • Basic commands (ls, cd, grep, find, awk, sed)
  • File permissions and ownership
  • Process management (ps, top, kill)
  • System administration basics
  • Practice: Set up Ubuntu VM, perform common tasks

Day 3-4: Cloud Basics (AWS)

  • EC2, S3, VPC fundamentals
  • IAM roles and policies
  • Security Groups and NACLs
  • Hands-on: Launch EC2 instance, create S3 bucket

Day 5-7: Containerization

  • Docker fundamentals
  • Dockerfile best practices
  • Docker Compose
  • Hands-on: Containerize a sample application

Resources:

Week 2: Infrastructure as Code (Days 8-14)

Day 8-10: Terraform

  • Terraform basics (resources, providers, state)
  • Modules and workspaces
  • Remote state (S3 + DynamoDB)
  • Hands-on: Create infrastructure with Terraform

Day 11-12: CloudFormation (Optional)

  • CloudFormation basics
  • Templates and stacks
  • Hands-on: Create CloudFormation stack

Day 13-14: Practice

  • Build complete infrastructure (VPC, EC2, RDS)
  • Use version control (Git)
  • Practice: Deploy infrastructure from scratch

Resources:

Week 3: Orchestration & CI/CD (Days 15-21)

Day 15-17: Kubernetes

  • Kubernetes fundamentals (pods, services, deployments)
  • ConfigMaps and Secrets
  • Ingress and networking
  • Hands-on: Deploy application to minikube/kind

Day 18-19: CI/CD

  • GitLab CI or GitHub Actions
  • Pipeline design
  • Docker builds in CI/CD
  • Hands-on: Create CI/CD pipeline

Day 20-21: Practice

  • Deploy application with Kubernetes
  • Set up CI/CD pipeline
  • Practice: End-to-end deployment

Resources:

Week 4: Advanced Topics & Interview Prep (Days 22-30)

Day 22-24: Monitoring & Logging

  • CloudWatch, Prometheus, Grafana basics
  • Log aggregation (ELK stack)
  • Alerting and dashboards
  • Hands-on: Set up monitoring

Day 25-26: Security

  • Security best practices
  • Secrets management
  • Network security
  • Compliance basics

Day 27-28: Interview Practice

  • Review questions in this handbook
  • Practice explaining concepts
  • Work through scenarios
  • Mock interviews

Day 29-30: Final Review

  • Review all topics
  • Practice architecture design
  • Review troubleshooting scenarios
  • Prepare questions for interviewer

60-Day Comprehensive Plan

Month 1: Core Skills (Days 1-30)

Weeks 1-2: Linux & Cloud Foundations

  • Deep dive into Linux administration
  • AWS core services (EC2, S3, VPC, RDS, IAM)
  • Hands-on projects: Multi-tier application on AWS

Weeks 3-4: Containers & Orchestration

  • Advanced Docker (multi-stage builds, optimization)
  • Kubernetes deep dive (advanced concepts, operators)
  • Hands-on: Microservices on Kubernetes

Month 2: Advanced & Specialization (Days 31-60)

Week 5: Infrastructure as Code

  • Terraform advanced (modules, workspaces, state management)
  • Ansible basics (configuration management)
  • Hands-on: Complete infrastructure project

Week 6: CI/CD & Automation

  • Advanced CI/CD (multi-stage, parallelization, optimization)
  • GitOps (ArgoCD/Flux)
  • Hands-on: Optimize CI/CD pipeline

Week 7: Monitoring & Observability

  • Prometheus + Grafana
  • ELK stack
  • Distributed tracing
  • Hands-on: Complete observability stack

Week 8: Security & Interview Prep

  • Security best practices
  • Compliance (SOC 2, PCI DSS)
  • Interview preparation
  • Mock interviews

90-Day Mastery Path

Month 1: Foundations (Days 1-30)

Focus: Build strong fundamentals

  • Linux mastery
  • Cloud platform expertise (AWS/GCP/Azure)
  • Containerization
  • Basic networking

Projects:

  1. Deploy LAMP stack on AWS
  2. Containerize application
  3. Set up basic monitoring

Month 2: Intermediate Skills (Days 31-60)

Focus: Infrastructure and automation

  • Infrastructure as Code (Terraform)
  • Kubernetes orchestration
  • CI/CD pipelines
  • Configuration management

Projects:

  1. Complete infrastructure project
  2. Microservices on Kubernetes
  3. CI/CD pipeline with testing
  4. Multi-environment setup

Month 3: Advanced & Specialization (Days 61-90)

Focus: Advanced topics and real-world scenarios

  • Advanced Kubernetes (operators, service mesh)
  • Disaster recovery
  • Security hardening
  • Performance optimization
  • Interview preparation

Projects:

  1. Multi-region setup
  2. Disaster recovery plan
  3. Security audit and hardening
  4. Performance optimization
  5. Complete portfolio project

Daily Study Schedule

Recommended Daily Routine (2-3 hours)

Morning (1 hour):

  • Read documentation or watch tutorials
  • Take notes
  • Review previous day's material

Evening (1-2 hours):

  • Hands-on practice
  • Work on projects
  • Solve problems
  • Review questions

Weekly Schedule

Monday-Wednesday: Learn new concepts Thursday: Practice and hands-on Friday: Review and consolidate Weekend: Project work or deep dive

Learning Resources by Topic

Linux

  • Books: "The Linux Command Line" by William Shotts
  • Courses: Linux Academy, Udemy Linux courses
  • Practice: Set up home lab, Linux challenges

Cloud (AWS)

  • Certification: AWS Certified Solutions Architect
  • Courses: A Cloud Guru, Linux Academy
  • Practice: AWS Free Tier, build projects
  • Documentation: AWS Well-Architected Framework

Kubernetes

  • Certification: CKA (Certified Kubernetes Administrator)
  • Courses: Kubernetes the Hard Way, KodeKloud
  • Practice: minikube, kind, Play with Kubernetes
  • Documentation: Kubernetes.io official docs

Terraform

  • Certification: HashiCorp Terraform Associate
  • Courses: Terraform Learn, Udemy courses
  • Practice: Build infrastructure projects
  • Examples: terraform-aws-modules

CI/CD

  • Courses: GitLab CI, GitHub Actions tutorials
  • Practice: Set up pipelines for projects
  • Documentation: Platform-specific docs

Practice Projects

Beginner Projects

  1. Static Website on AWS

    • S3 + CloudFront
    • Route 53
    • SSL certificate

  2. Dockerized Application

    • Multi-container app
    • Docker Compose
    • Deploy to cloud

  3. Basic CI/CD

    • GitHub Actions/GitLab CI
    • Build and test
    • Deploy to staging

Intermediate Projects

  1. Multi-Tier Application

    • VPC with public/private subnets
    • Application servers
    • Database (RDS)
    • Load balancer

  2. Kubernetes Deployment

    • Deploy microservices
    • Services and Ingress
    • ConfigMaps and Secrets
    • Monitoring

  3. Infrastructure as Code

    • Complete infrastructure in Terraform
    • Multiple environments
    • Remote state
    • Modules

Advanced Projects

  1. Multi-Region Setup

    • Active-active architecture
    • Database replication
    • Disaster recovery

  2. Complete DevOps Pipeline

    • Source control
    • CI/CD
    • Infrastructure as Code
    • Monitoring
    • Security scanning

  3. Production-Ready Application

    • High availability
    • Auto-scaling
    • Monitoring and alerting
    • Security hardening
    • Disaster recovery

Interview Preparation Checklist

Technical Knowledge

  • Can explain core concepts clearly
  • Understand trade-offs
  • Know when to use what
  • Can troubleshoot common issues

Hands-on Skills

  • Comfortable with command line
  • Can write basic scripts
  • Can deploy applications
  • Can debug issues

Communication

  • Can explain technical concepts to non-technical people
  • Can discuss trade-offs
  • Can ask clarifying questions
  • Can think out loud during problem-solving

Portfolio

  • GitHub profile with projects
  • Documentation of projects
  • Can discuss projects in detail
  • Can explain design decisions

Tips for Success

  1. Consistency: Study regularly, even if just 30 minutes
  2. Hands-on: Practice is essential, don't just read
  3. Projects: Build real projects, not just tutorials
  4. Documentation: Read official documentation
  5. Community: Join DevOps communities, ask questions
  6. Mock Interviews: Practice explaining concepts
  7. Review: Regularly review previous material
  8. Focus: Don't try to learn everything, focus on fundamentals

Adjusting the Roadmap

If You Have More Time:

  • Add more projects
  • Deep dive into specific areas
  • Get certifications
  • Contribute to open source

If You Have Less Time:

  • Focus on core topics
  • Prioritize hands-on practice
  • Use this handbook's questions as study guide
  • Focus on your target role's requirements

Next Steps

  1. Assess Your Level: Review checklists in this handbook
  2. Choose Timeline: 30, 60, or 90 days
  3. Set Goals: What role are you targeting?
  4. Start Learning: Begin with Week 1, Day 1
  5. Track Progress: Check off items as you complete them
  6. Practice: Build projects, solve problems
  7. Review: Regularly review this handbook's questions
  8. Interview: Apply and practice!

Good luck with your preparation! 🚀