DevOps Interview Questions
MCQ Quiz · All Difficulty Levels
Test your DevOps interview readiness with MCQs covering the practices, tools, and culture shifts that define modern software delivery. Topics include CI/CD pipeline design and tooling (GitHub Actions, Jenkins, GitLab CI), infrastructure as code (Terraform, Ansible, CloudFormation), container orchestration with Kubernetes (pods, deployments, services, ingress, Helm), monitoring and observability (metrics with Prometheus, logs with ELK, traces with Jaeger, SLIs and SLOs), cloud fundamentals (AWS, GCP, Azure core services), deployment strategies (blue-green, canary, rolling, feature flags), SRE principles including error budgets and toil reduction, and incident management. DevOps and platform engineering roles are among the fastest-growing in the industry. Interviews assess both deep tool knowledge and systemic thinking about reliability, automation, and delivery velocity. Difficulty levels move from Trainee (CI/CD basics, deployment concepts, cloud fundamentals) through Junior Dev (Kubernetes basics, IaC introduction, monitoring essentials) and Mid Level (pipeline design, SRE metrics, multi-cloud) to Senior Dev (platform engineering architecture, FinOps, organization-level DevOps transformation).
Frequently Asked Questions: DevOps Interviews
Common questions developers ask when preparing for DevOps technical interviews.
What DevOps topics are most commonly tested in platform engineering interviews?
CI/CD pipeline design and tooling (GitHub Actions, Jenkins, GitLab CI) top the list at most companies. Kubernetes concepts (pods, deployments, services, ConfigMaps, Helm charts) follow closely for platform and infrastructure roles. Infrastructure as code with Terraform or Ansible, monitoring and observability (metrics vs logs vs traces, SLIs and SLOs), deployment strategies (blue-green, canary, rolling), and cloud fundamentals are all regularly tested. Senior roles focus on system reliability, toil reduction, and architectural decision-making.
What is CI/CD and why is it important for modern software teams?
Continuous Integration (CI) is the practice of automatically building and testing code changes when they are pushed to a shared repository, catching integration bugs early. Continuous Delivery/Deployment (CD) automates the release pipeline so that validated changes can be deployed to production quickly and reliably. Together they reduce the lead time from code change to production, improve code quality through automated testing gates, and enable smaller, safer deployments, a core principle of both DevOps and SRE practices.
What is the difference between Kubernetes Deployment and StatefulSet?
A Deployment manages stateless application replicas, pods are interchangeable, and Kubernetes can schedule them on any node and replace them freely. A StatefulSet manages stateful applications (databases, message brokers) where pods need stable, unique network identifiers and persistent storage. StatefulSets create pods in order, maintain sticky identities across restarts, and use PersistentVolumeClaims to ensure each pod consistently gets the same storage volume.
What is infrastructure as code and which tools should I know?
Infrastructure as code (IaC) means defining and provisioning infrastructure through machine-readable configuration files rather than manual processes, enabling version control, repeatability, and peer review of infrastructure changes. Terraform is the dominant tool for multi-cloud provisioning, it uses HCL and a declarative model. Ansible is widely used for configuration management and application deployment. AWS CloudFormation is native to AWS. Knowing Terraform at a working level is the most transferable skill across roles.
What is the difference between SRE and DevOps?
DevOps is a cultural philosophy and set of practices focused on breaking down silos between development and operations teams to improve delivery speed and reliability. SRE (Site Reliability Engineering) is Google's implementation of DevOps principles using software engineering to solve operations problems, with specific practices like error budgets, SLOs, SLAs, and eliminating toil through automation. In practice, many companies blend the roles: DevOps engineers focus on tooling and automation while SREs own reliability targets and incident response.