<DevOps Ocean/> Daily challenges →

508+ DevOps Interview Questions — Free Samples with Answers

These are free interactive samples with explained answers. The full bank of 508+ questions — plus daily challenges, XP, streaks and a global leaderboard — is free once you sign in. Start now →

☸️ Kubernetes (5 free samples of 50)

• A pod is stuck in 'Pending' state. Which command gives the most useful diagnostic info?
• How does a Readiness probe differ from a Liveness probe?
• What is the role of the Kubernetes API server?
• Which Kubernetes Service type provisions a cloud load balancer with an external IP?
• What is a Kubernetes ServiceAccount?
• 🔒 +45 more Kubernetes questions — sign in free to practice them →

🌊 Docker (5 free samples of 50)

• Does the EXPOSE instruction publish the port to the host?
• What does docker inspect <container> return?
• What is Docker Buildx used for?
• What does docker run -p 127.0.0.1:8080:80 myapp do?
• What is the difference between CMD and ENTRYPOINT in a Dockerfile?
• 🔒 +45 more Docker questions — sign in free to practice them →

🌊 AWS (5 free samples of 50)

• What is the difference between ECS and EKS?
• When should you use AWS Fargate vs EC2 launch type for ECS/EKS?
• What is Amazon EventBridge?
• Which AWS service should you use to store application secrets like database passwords?
• What does AWS CodeDeploy do in the AWS DevOps stack?
• 🔒 +45 more AWS questions — sign in free to practice them →

🌊 Linux (5 free samples of 50)

• What is the correct crontab syntax to run a script every day at 2:30 AM?
• What does iostat -xz 1 show?
• How do you make an environment variable available to child processes in Bash?
• What does ln -s /path/to/original /path/to/link create?
• What does the chmod 755 command set on a file?
• 🔒 +45 more Linux questions — sign in free to practice them →

🌊 CI/CD (4 free samples of 49)

• What is SonarQube used for in a CI pipeline?
• What are conventional commits?
• What is a GitHub Actions composite action?
• What is Time to Restore Service (MTTR) and how do you improve it?
• 🔒 +45 more CI/CD questions — sign in free to practice them →

🔀 Git (3 free samples of 20)

• What is the key difference between git rebase and git merge?
• What is the practical difference between merge and rebase?
• What is the difference between an annotated and a lightweight Git tag?
• 🔒 +17 more Git questions — sign in free to practice them →

🌊 Terraform (4 free samples of 50)

• What are Terraform data sources?
• What is Terraform Cloud and what does it add over local Terraform?
• What is the terraform_remote_state data source used for?
• What is sensitive = true on a Terraform variable or output?
• 🔒 +46 more Terraform questions — sign in free to practice them →

🌊 SRE (6 free samples of 47)

• What is a Service Level Indicator (SLI)?
• What is alert fatigue and how do you combat it?
• What does the PromQL rate() function calculate?
• How does on-call rotation scheduling work in SRE?
• What is load testing and how does it differ from stress testing?
• What is the difference between MTTD (Mean Time To Detect) and MTTF (Mean Time To Failure)?
• 🔒 +41 more SRE questions — sign in free to practice them →

📈 Monitoring (2 free samples of 22)

• What kind of database is Prometheus at its core?
• What is the difference between blackbox and whitebox monitoring?
• 🔒 +20 more Monitoring questions — sign in free to practice them →

🔌 Networking (2 free samples of 20)

• What is the fundamental difference between TCP and UDP?
• What does the TLS handshake accomplish?
• 🔒 +18 more Networking questions — sign in free to practice them →

🌊 Google Cloud (5 free samples of 50)

• What is the gcloud CLI used for?
• How does GCP's Global HTTP(S) Load Balancer differ from regional load balancers?
• What is Dataflow (Apache Beam) used for?
• What is Google BigQuery used for?
• What is GCP Filestore?
• 🔒 +45 more Google Cloud questions — sign in free to practice them →

🌊 Ansible (5 free samples of 50)

• How do host_vars and group_vars work in Ansible?
• What is the Ansible template module?
• What is the difference between ignore_errors and failed_when?
• What is an Ansible inventory file?
• How do you encrypt individual variables with ansible-vault?
• 🔒 +45 more Ansible questions — sign in free to practice them →