DevOps Interview Question Library (2026)
50+ curated questions across technical, behavioral, system design, scenario, and tool-specific categories — filterable by difficulty level, topic tag, and keyword. Each question includes a hint on what a strong answer covers.
Why use structured interview questions
Unstructured interviews are inconsistent and prone to bias. Using a shared set of questions helps you compare candidates fairly and focus on how they think and what they've done. Technical questions reveal depth in CI/CD, infrastructure, and reliability. Behavioral questions show how they handle incidents, collaboration, and tradeoffs. System design questions test scalability, observability, and failure modes. Scenario questions simulate real incidents and decisions. Tool-specific questions assess hands-on depth with Kubernetes, Terraform, AWS, and more. This library gives you 50+ questions you can filter by difficulty (Junior through Staff) and topic.
How to use this library
Pick a mix of questions that match the role: more system design for senior or staff levels, more hands-on technical for mid-level. Use the difficulty filter to narrow by seniority, and the tag filter to focus on specific tools or topics. Each question has a “what good looks like” hint you can expand to help calibrate your rubric. Use the same core set across candidates so you can compare answers fairly. Listen for specifics (tools, metrics, outcomes) rather than generic answers.
- TechnicalMidci-cdautomation
Walk me through your CI/CD pipeline. What tools do you use and why?
- TechnicalMidincident-responsesre
How do you approach incident response and post-incident reviews?
- TechnicalMidiacterraform
Explain how you use infrastructure as code. What patterns do you follow?
- TechnicalMidsecurityconfiguration
How do you handle secrets and configuration across environments?
- TechnicalSeniorci-cddeployment
Describe how you would set up a zero-downtime deployment pipeline.
- TechnicalMidterraformiac
How do you manage Terraform state in a team environment?
- TechnicalSeniorkubernetesmonitoring
What metrics do you monitor for a production Kubernetes cluster?
- TechnicalSeniorkubernetessecuritynetworking
How do you implement and enforce network policies in Kubernetes?
- TechnicalMidkubernetesdebugging
Walk me through how you would debug a container that keeps crashing in production.
- TechnicalSeniorloggingobservability
How do you implement centralized logging across distributed services?
- TechnicalMidsremonitoring
Explain the difference between SLIs, SLOs, and SLAs and how you use them.
- TechnicalSeniorci-cdsecuritycompliance
How would you automate compliance checks in a CI pipeline?
- BehavioralMidsrereliability
Describe a time you improved system reliability. What metrics did you use?
- BehavioralSeniorprioritizationleadership
How do you balance feature delivery with technical debt and reliability?
- BehavioralMidincident-response
Tell me about a production outage you helped resolve. What was your role?
- BehavioralSeniorcollaborationleadership
How do you work with developers who push back on reliability practices?
- BehavioralJuniorlearningadaptability
Tell me about a time you had to learn a new technology quickly to solve a problem.
- BehavioralSeniorcollaborationcommunication
Describe a situation where you disagreed with a technical decision. How did you handle it?
- BehavioralSeniorleadershipdocumentation
How do you onboard a new team member onto a complex infrastructure?
- BehavioralMidautomationefficiency
Tell me about a time you automated something that saved your team significant time.
- BehavioralMidon-callsre
How do you handle being on-call? What practices help you stay effective?
- BehavioralJunioradaptabilitycommunication
Describe a project where requirements changed significantly mid-way. How did you adapt?
- System designSeniorscalingarchitecture
Design a system that handles 10x traffic spike. What would you add or change?
- System designSeniormonitoringalertingobservability
How would you design monitoring and alerting for a critical payment service?
- System designStaffsremonitoring
Design an SLO and error budget system for a team. How would you implement it?
- System designStaffarchitecturenetworkingreliability
How would you design a multi-region deployment for low latency and failover?
- System designSeniorkubernetesci-cdgitops
Design a GitOps workflow for deploying microservices to Kubernetes.
- System designStaffplatform-engineeringarchitecture
How would you architect a centralized platform for developer self-service?
- System designSeniorreliabilityarchitecture
Design a disaster recovery plan for a cloud-native application.
- System designSeniorfinopsarchitecturescaling
How would you design a cost-optimized architecture for a variable-traffic SaaS product?
- System designStaffobservabilitymonitoringlogging
Design an observability stack from scratch for a microservices architecture.
- ScenarioMidincident-responsedeployment
A deployment went out and error rates doubled. Walk me through your first 10 minutes.
- ScenarioMidkubernetesscaling
Your Kubernetes cluster is running out of capacity during a traffic spike. What do you do?
- ScenarioJuniorsecurityincident-response
A developer commits a secret to a public repository. What steps do you take?
- ScenarioSeniordatabasesdebuggingmonitoring
Your monitoring shows a gradual increase in database query latency over the past week. How do you investigate?
- ScenarioSeniorplatform-engineeringleadership
A team wants to adopt a new tool that conflicts with your standardized stack. How do you handle it?
- ScenarioMidci-cdautomation
Your CI/CD pipeline has become so slow that developers are skipping tests. What do you do?
- ScenarioSeniorfinopscost-optimization
A cloud bill comes in 40% over budget. How do you investigate and remediate?
- ScenarioMidfinopsarchitecture
An engineer proposes running a critical workload on spot instances to save money. How do you evaluate this?
- ScenarioSeniordocumentationreliability
You inherit an undocumented legacy system that your team now owns. What's your plan for the first month?
- ScenarioSenioron-callsrealerting
Your on-call engineer is getting paged 5+ times per night. How do you fix this?
- Tool-specificSeniorterraformiac
Compare Terraform and Pulumi for managing cloud infrastructure. When would you choose each?
- Tool-specificMidkuberneteshelm
How do you manage Helm charts across multiple environments?
- Tool-specificMidmonitoringprometheusgrafana
Explain how you configure and use Prometheus and Grafana for a production workload.
- Tool-specificSeniorawskubernetessecurity
How would you set up AWS IAM roles for a multi-account Kubernetes deployment?
- Tool-specificSeniorobservabilitytracing
Describe how you would use Datadog (or similar) to implement distributed tracing.
- Tool-specificMiddockerci-cd
How do you manage Docker image builds for fast, secure, and reproducible results?
- Tool-specificMidansibleconfiguration
Explain how you use Ansible for configuration management at scale.
- Tool-specificStaffkubernetesnetworkingservice-mesh
How would you implement a service mesh (e.g. Istio or Linkerd) and when is it worth the complexity?
- Tool-specificMidci-cd
Compare GitHub Actions, GitLab CI, and Jenkins for a mid-size engineering org.
- Tool-specificSeniorterraformiac
How do you use Terraform workspaces vs separate state files for environment isolation?
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