Common DevOps Interview Questions

With rapid cloud adoption, automation, and agile development, DevOps has become a core competency for IT professionals seeking top roles in the tech industry. Whether interviewing for DevOps Engineer, Site Reliability Engineer, or related positions, you can expect questions that assess both technical and cultural understanding of the DevOps approach. Here are some of the most common and important DevOps interview questions to help prepare for your next interview in 2025.



1. What is DevOps?

DevOps is a collaborative culture and set of practices that aim to unify software development (Dev) and IT operations (Ops). The key goal is to shorten the system development life cycle, while delivering features, fixes, and updates more frequently—in alignment with business objectives. DevOps emphasizes automation, continuous integration/continuous deployment (CI/CD), and constant feedback and improvement throughout the lifecycle.


2. How is DevOps different from Agile?

Both DevOps and Agile aim to improve software delivery, but their focuses differ. Agile is a software development approach focused on iterative progress, small releases, and responsiveness to customer feedback. DevOps, in contrast, extends beyond development to incorporate operations—enabling faster, more reliable delivery using pipelines and automation.


3. What are the phases of the DevOps lifecycle?

Typical DevOps phases include Planning, Coding, Building, Testing, Releasing, Deploying, Operating, and Monitoring. Automation and feedback loops are integrated into every phase to ensure quality and efficiency in delivery.


4. Name some popular DevOps tools.

Proficiency with DevOps tools is often tested, so expect to discuss:

Version control: Git

Continuous Integration: Jenkins

Containerization: Docker, Kubernetes

Testing: Selenium

Configuration Management: Ansible, Chef, Puppet

Monitoring: Nagios, Prometheus


5. What is Continuous Integration (CI) and Continuous Deployment (CD)?

CI/CD are critical DevOps concepts. Continuous Integration is the practice of merging code changes into a shared repository several times a day and testing them automatically. Continuous Deployment refers to the automated release of validated code to production. Together, they enable rapid, reliable software delivery.


6. Explain Infrastructure as Code (IaC).

IaC is the practice of managing and provisioning computing infrastructure via machine-readable definition files rather than manual processes. Tools like Terraform, Ansible, and AWS CloudFormation automate infrastructure provisioning, enabling consistency and scalability.


7. How do you ensure system reliability during unexpected spikes in traffic?

Interviewers often pose scenario-based questions about scaling and resilience. A typical response involves using monitoring tools, auto-scaling policies, and load balancers to distribute workloads. Proactive strategies for caching, redundancy, and elasticity are valued.


8. How do you foster a DevOps culture within teams?

DevOps is not only about tools and technology. Building a DevOps culture requires collaboration between Dev, Ops, and QA, open communication, and a shared responsibility for outcomes. Practices like joint standups, shared dashboards, and cross-functional teams are important for cultural transformation.



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