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🗺️ Interactive Career Blueprint · 2026 Edition

DevOps & SRE Interview Preparation Roadmap

A structured, battle-tested curriculum designed for Lead SRE and Platform Architect interviews. Check off milestones as you master them, test your readiness against 1,029+ real-world production incident questions, and track your progress in real-time.

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0 of 14 Milestones Mastered

Stage 1: Linux & Systems Engineering Foundations

Junior to Mid

Master operating system fundamentals, kernel memory management, POSIX signals, network protocols, and disaster recovery via Git.

Understand fork/exec, uninterruptible sleep (D-state) due to NFS/disk I/O deadlocks, zombie processes, nice/renice scheduling, and decoding /proc virtual filesystem.

Linux Kernel Troubleshooting
🎯 Tested Interview Scenarios in This Area:

Deep dive into TCP 3-way handshake, SYN flood defense (syncookies), TIME_WAIT socket exhaustion, MTU/MSS fragmentation, and end-to-end DNS client-to-nameserver resolution.

Networking DNS TCP/IP
🎯 Tested Interview Scenarios in This Area:

Understand Git DAG (commits, trees, blobs), interactive rebase vs 3-way merge, recovering deleted commits with git reflog, and bisecting production regression bugs.

Git CI/CD Version Control
🎯 Tested Interview Scenarios in This Area:

Stage 2: Containers & Cloud Infrastructure Architecture

Mid-Level Cloud

Master Linux container primitives, Docker multi-stage build optimization, AWS multi-AZ VPC design, IAM least-privilege, and Infrastructure as Code.

How container runtimes isolate PID, mount, and net namespaces; enforcing memory/CPU limits with cgroups v2; and slimming images from 3GB to 50MB using multi-stage builds.

Docker Containers Optimization
🎯 Tested Interview Scenarios in This Area:

Calculate subnets with the Magic Number method, avoid VPC CIDR exhaustion in EKS, design multi-AZ public/private subnets, and configure VPC Endpoints to eliminate NAT data charges.

AWS VPC Cloud Networking
🎯 Tested Interview Scenarios in This Area:

Design enterprise-grade Terraform repositories, enforce remote state locking via S3 and DynamoDB, handle provider upgrades safely, and remediate unexpected plan drifts.

Terraform IaC State Management
🎯 Tested Interview Scenarios in This Area:

Stage 3: Kubernetes Production Mastery & SRE Drills

Senior SRE

Deep architectural mastery of Kubernetes control plane, CNI packet flow, etcd quorum recovery, production incident runbooks, and GitOps continuous delivery.

Understand API Server optimistic concurrency, Controller Manager reconciliation loops, kube-scheduler algorithm, and recovering etcd cluster quorum following node failures.

Kubernetes etcd Control Plane
🎯 Tested Interview Scenarios in This Area:

Algorithmic 5-minute triage of Exit Code 137 (OOMKilled) vs Exit Code 1, readiness probe death spirals, pending PVC volume attachment locks, and eviction thresholds.

Kubernetes Incident Runbooks Troubleshooting
🎯 Tested Interview Scenarios in This Area:

Implement declarative GitOps reconciliation loops, manage drift detection, configure ignoreDifferences for HPA, and execute automated zero-downtime canary deployments.

GitOps ArgoCD Helm
🎯 Tested Interview Scenarios in This Area:

Design modern telemetry pipelines using OpenTelemetry Collector, write advanced PromQL queries (rate vs irate), and build multi-window multi-burn-rate alerting strategies.

Observability Prometheus SLO / SRE
🎯 Tested Interview Scenarios in This Area:

Stage 4: Enterprise Scale, Security & Platform Leadership

Staff / Principal Architect

Architect multi-region active-active cloud topologies, zero-downtime database cutovers, chaos engineering resilience drills, and FinOps unit economics.

Design global low-latency applications with CloudFront and Route 53 latency routing, dual-write CDC replication, database migration cutovers, and deterministic rollback plans.

System Design Cloud Architecture High Availability
🎯 Tested Interview Scenarios in This Area:

Execute Netflix-style chaos experiments in Kubernetes, test downstream failure modes with Istio fault injection, and implement circuit breakers to prevent cascading outages.

Chaos Engineering Resilience SRE
🎯 Tested Interview Scenarios in This Area:

Secure the software supply chain using Sigstore/Cosign container signing, vulnerability scanning gates in CI, and enforcing admission policy-as-code using Kyverno and OPA Gatekeeper.

Security DevSecOps Policy as Code
🎯 Tested Interview Scenarios in This Area:

Analyze cost attribution with AWS Cost Allocation Tags, architect Spot instances with Karpenter/Autoscaler, configure S3 Intelligent-Tiering, and manage Reserved Instances/Savings Plans.

FinOps Cost Optimization AWS
🎯 Tested Interview Scenarios in This Area:
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